Silicon Laboratories Si446 Series User manual

Rev. 0.1 8/11 Copyright © 2011 by Silicon Laboratories AN625
Silicon Laboratories Confidential. Information contained herein is covered under non-disclosure agreement (NDA).
AN625
Si446XAPI DESCRIPTIONS
1. Introduction
This document provides API descriptions for the commands and properties used to control and configure the
Si446x family.
2. API Summary
2.1. Command Summary
Table 1. Command Summary
Boot Commands
Number Name Summary
0x02 POWER_UP Power-up device and mode selection. Modes include operational
function.
0x04 PATCH_IMAGE Loads image from NVM/ROM into RAM.
Common Commands
Number Name Summary
0x00 NOP No operation command
0x01 PART_INFO Reports basic information about the device.
0x10 FUNC_INFO Returns the Function revision information of the device.
0x11 SET_PROPERTY Sets the value of a property.
0x12 GET_PROPERTY Retrieve a property's value.
0x13 GPIO_PIN_CFG Configures the GPIO pins.
0x14 GET_ADC_READING Retrieve the results of possible ADC conversions.
0x15 FIFO_INFO Provides access to transmit and receive fifo counts and reset.
0x16 GET_PACKET_INFO Returns information about the last packet received.
0x17 IRCAL Calibrate Image Rejection (Si4463 and Si4464 only).
0x18 PROTOCOL_CFG Sets the chip up for specified protocol.
0x20 GET_INT_STATUS Returns the interrupt status byte.
0x21 GET_PH_STATUS Returns the packet handler status.
0x22 GET_MODEM_STATUS Returns the modem status byte.
0x23 GET_CHIP_STATUS Returns the chip status.
0x31 START_TX Switches to TX state and starts packet transmission.
0x32 START_RX Switches to RX state. Command arguments are retained though
sleep state, so these only need to be written when they change.
0x33 REQUEST_DEVICE_STATE Request current device state.
0x34 CHANGE_STATE Update state machine entries.
0x36 RX_HOP Fast RX to RX transitions for use in frequency hopping systems

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2 Rev. 0.1
2.2. Property Summary
Common Properties
Number Name Default Summary
0x0100 INT_CTL_ENABLE 0x04 Interrupt enable property
0x0101 INT_CTL_PH_ENABLE 0x00 Packet handler interrupt enable property
0x0102 INT_CTL_MODEM_ENABLE 0x00 Modem interrupt enable property
0x0103 INT_CTL_CHIP_ENABLE 0x04 Chip interrupt enable property
0x0200 FRR_CTL_A_MODE 0x01 Fast Response Register A Configuration
0x0201 FRR_CTL_B_MODE 0x02 Fast Response Register B Configuration
0x0202 FRR_CTL_C_MODE 0x09 Fast Response Register C Configuration
0x0203 FRR_CTL_D_MODE 0x00 Fast Response Register D Configuration
0x1101 SYNC_BITS_31_24 0x2D Byte 3 of sync word
0x1102 SYNC_BITS_23_16 0xD4 Byte 2 of sync word
0x2400 EZCONFIG_MODULATION 0x02 Configure modulation using the EZ config
feature.
0x4000 FREQ_CONTROL_INTE 0x3C Frac-N PLL integer number.
0x4001 FREQ_CONTROL_FRAC_2 0x08 Byte 2 of Frac-N PLL fraction number.
0x4002 FREQ_CONTROL_FRAC_1 0x00 Byte 1 of Frac-N PLL fraction number.
0x4003 FREQ_CONTROL_FRAC_0 0x00 Byte 0 of Frac-N PLL fraction number.
0x4004 FREQ_CONTROL_CHANNEL_STEP_SIZE_1 0x00 Byte 1 of channel step size.
0x4005 FREQ_CONTROL_CHANNEL_STEP_SIZE_0 0x00 Byte 0 of channel step size.
0x0000 GLOBAL_XO_TUNE 0x40 Configure crystal oscillator frequency tun-
ing bank
0x0001 GLOBAL_CLK_CFG 0 Clock configuration options
0x0002 GLOBAL_LOW_BATT_THRESH 0x18 Low battery threshold
0x0003 GLOBAL_CONFIG 0 Global configuration settings
0x0004 GLOBAL_WUT_CONFIG 0x00 GLOBAL WUT configuation
0x0005 GLOBAL_WUT_M_15_8 0x00 Configure WUT_M_15_8
0x0006 GLOBAL_WUT_M_7_0 0x01 Configure WUT_M_7_0
0x0007 GLOBAL_WUT_R 0x00 Configure WUT_R
0x0008 GLOBAL_WUT_LDC 0x00 Configure WUT_LDC
0x1000 PREAMBLE_TX_LENGTH 0x08 Preamble length
0x1001 PREAMBLE_CONFIG_STD_1 0x14 Standard preamble configuration
0x1002 PREAMBLE_CONFIG_NSTD 0x00 Non-standard preamble configuation

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Rev. 0.1 3
0x1003 PREAMBLE_CONFIG_STD_2 0x0F Standard preamble configuration
0x1004 PREAMBLE_CONFIG 0x21 Preamble configuration bits
0x1005 PREAMBLE_PATTERN_31_24 0 Preamble pattern
0x1006 PREAMBLE_PATTERN_23_16 0 Preamble pattern
0x1007 PREAMBLE_PATTERN_15_8 0 Preamble pattern
0x1008 PREAMBLE_PATTERN_7_0 0 Preamble pattern
0x1100 SYNC_CONFIG 0x01 Sync configuration bits
0x1103 SYNC_BITS_15_8 0x2D Byte 1 of sync word
0x1104 SYNC_BITS_7_0 0xD4 Byte 0 of sync word
0x1200 PKT_CRC_CONFIG 0 Select a CRC polynomial and seed
0x1206 PKT_CONFIG1 0 General packet configuration bits
0x1208 PKT_LEN 0x00 Provides information regarding how to
use the length from the received packet.
0x1209 PKT_LEN_FIELD_SOURCE 0 Field number containing the embedded
length field.
0x120A PKT_LEN_ADJUST 0 Adjust length field by this amount to
derive the variable length information.
0x120B PKT_TX_THRESHOLD 0x30 TX almost empty threshold.
0x120C PKT_RX_THRESHOLD 0x30 RX almost full threshold.
0x120D PKT_FIELD_1_LENGTH_12_8 0x00 Byte 1 of field length
0x120E PKT_FIELD_1_LENGTH_7_0 0x00 Byte 0 of field length
0x120F PKT_FIELD_1_CONFIG 0x00 Field 1 configuration bits.
0x1210 PKT_FIELD_1_CRC_CONFIG 0x00 Field 1 CRC configuration bits.
0x1211 PKT_FIELD_2_LENGTH_12_8 0x00 Byte 1 of field length
0x1212 PKT_FIELD_2_LENGTH_7_0 0x00 Byte 0 of field length
0x1213 PKT_FIELD_2_CONFIG 0x00 Field 2 configuration bits.
0x1214 PKT_FIELD_2_CRC_CONFIG 0x00 Field 2 CRC configuration bits.
0x1215 PKT_FIELD_3_LENGTH_12_8 0x00 Byte 1 of field length
0x1216 PKT_FIELD_3_LENGTH_7_0 0x00 Byte 0 of field length
0x1217 PKT_FIELD_3_CONFIG 0x00 Field 3 configuration bits.
0x1218 PKT_FIELD_3_CRC_CONFIG 0x00 Field 3 CRC configuration bits.
0x1219 PKT_FIELD_4_LENGTH_12_8 0x00 Byte 1 of field length
0x121A PKT_FIELD_4_LENGTH_7_0 0x00 Byte 0 of field length
Common Properties
Number Name Default Summary

AN625
4 Rev. 0.1
0x121B PKT_FIELD_4_CONFIG 0x00 Field 4 configuration bits.
0x121C PKT_FIELD_4_CRC_CONFIG 0x00 Field 4 CRC configuration bits.
0x121D PKT_FIELD_5_LENGTH_12_8 0x00 Byte 1 of field length
0x121E PKT_FIELD_5_LENGTH_7_0 0x00 Byte 0 of field length
0x121F PKT_FIELD_5_CONFIG 0x00 Field 5 configuration bits.
0x1220 PKT_FIELD_5_CRC_CONFIG 0x00 Field 5 CRC configuration bits.
0x1221 PKT_RX_FIELD_1_LENGTH_12_8 0x00 Byte 1 of field length for RX
0x1222 PKT_RX_FIELD_1_LENGTH_7_0 0x00 Byte 0 of field length for RX
0x1223 PKT_RX_FIELD_1_CONFIG 0x00 Field 1 configuration bits for RX.
0x1224 PKT_RX_FIELD_1_CRC_CONFIG 0x00 Field 1 CRC configuration bits for RX.
0x1225 PKT_RX_FIELD_2_LENGTH_12_8 0x00 Byte 1 of field length for RX
0x1226 PKT_RX_FIELD_2_LENGTH_7_0 0x00 Byte 0 of field length for RX
0x1227 PKT_RX_FIELD_2_CONFIG 0x00 Field 2 configuration bits for RX.
0x1228 PKT_RX_FIELD_2_CRC_CONFIG 0x00 Field 2 CRC configuration bits for RX.
0x1229 PKT_RX_FIELD_3_LENGTH_12_8 0x00 Byte 1 of field length for RX
0x122A PKT_RX_FIELD_3_LENGTH_7_0 0x00 Byte 0 of field length for RX
0x122B PKT_RX_FIELD_3_CONFIG 0x00 Field 3 configuration bits for RX.
0x122C PKT_RX_FIELD_3_CRC_CONFIG 0x00 Field 3 CRC configuration bits for RX.
0x122D PKT_RX_FIELD_4_LENGTH_12_8 0x00 Byte 1 of field length for RX
0x122E PKT_RX_FIELD_4_LENGTH_7_0 0x00 Byte 0 of field length for RX
0x122F PKT_RX_FIELD_4_CONFIG 0x00 Field 4 configuration bits for RX.
0x1230 PKT_RX_FIELD_4_CRC_CONFIG 0x00 Field 4 CRC configuration bits for RX.
0x1231 PKT_RX_FIELD_5_LENGTH_12_8 0x00 Byte 1 of field length for RX
0x1232 PKT_RX_FIELD_5_LENGTH_7_0 0x00 Byte 0 of field length for RX
0x1233 PKT_RX_FIELD_5_CONFIG 0x00 Field 5 configuration bits for RX.
0x1234 PKT_RX_FIELD_5_CRC_CONFIG 0x00 Field 5 CRC configuration bits for RX.
0x2000 MODEM_MOD_TYPE 0x02 Modulation Type
0x2001 MODEM_MAP_CONTROL 0x80 Controls bit mapping.
0x2002 MODEM_DSM_CTRL 0x07 DSM control
0x2003 MODEM_DATA_RATE_2 0x0F Byte 2 of TX data rate in bps (bits per
second).
0x2004 MODEM_DATA_RATE_1 0x42 Byte 1 of TX data rate in bps (bits per
second).
Common Properties
Number Name Default Summary

AN625
Rev. 0.1 5
0x2005 MODEM_DATA_RATE_0 0x40 Byte 0 of TX data rate in bps (bits per
second).
0x200A MODEM_FREQ_DEV_2 0x00 Byte 2 of TX frequency deviation (a 17-bit
unsigned number). This only programs
the MSB of TX frequency deviation.
0x200B MODEM_FREQ_DEV_1 0x06 Byte 1 of frequency deviation.
0x200C MODEM_FREQ_DEV_0 0xD3 Byte 0 of frequency deviation.
0x200D MODEM_RESERVED_20_0D 0x00
0x200E MODEM_RESERVED_20_0E 0x00
0x2049 MODEM_ANT_DIV_CONTROL 0x80 Specifies antenna diversity controls.
Antenna diversity mode is valid for stan-
dard packet only.
0x204A MODEM_RSSI_THRESH 0x08 RSSI threshold control
0x204B MODEM_RSSI_JUMP_THRESH 0x0C RSSI jumping detection threshold.
0x204C MODEM_RSSI_CONTROL 0x01 RSSI control
0x204D MODEM_RSSI_CONTROL2 0x00 RSSI control
0x204E MODEM_RSSI_COMP 0x32 RSSI reading offset.
0x2050 MODEM_RESERVED_20_50 0x00
0x2200 PA_MODE 0x10 PA operating mode and groups.
0x2201 PA_PWR_LVL 0x7F PA Level Configuration
0x2202 PA_BIAS_CLKDUTY 0x00 PA Bias and TX clock duty cycle configu-
ration
0x2203 PA_TC 0x01 PA cascode ramping Configuration
0x3000 MATCH_VALUE_1 0x00 Match 1 value.
0x3001 MATCH_MASK_1 0x00 Match 1 mask.
0x3002 MATCH_CTRL_1 0x00 Pacekt match enable and match 1 config-
uration.
0x3003 MATCH_VALUE_2 0x00 Match 2 value.
0x3004 MATCH_MASK_2 0x00 Match 2 mask.
0x3005 MATCH_CTRL_2 0x00 Match 2 configuration.
0x3006 MATCH_VALUE_3 0x00 Match 3 value.
0x3007 MATCH_MASK_3 0x00 Match 3 mask.
0x3008 MATCH_CTRL_3 0x00 Match 3 configuration.
0x3009 MATCH_VALUE_4 0x00 Match 4 value.
0x300A MATCH_MASK_4 0x00 Match 4 mask.
Common Properties
Number Name Default Summary

AN625
6 Rev. 0.1
0x300B MATCH_CTRL_4 0x00 Match 4 configuration.
0x4006 FREQ_CONTROL_W_SIZE 0x20 30 MHz clock cycles
0x4007 FREQ_CONTROL_VCOCNT_RX_ADJ 0xFF VCO target count adjustment for RX
0x5000 RX_HOP_CONTROL 0x04 RX hop control.
0x5001 RX_HOP_TABLE_SIZE 0x01 Number of entries in the RX hop table.
0x5002 RX_HOP_TABLE_ENTRY_0 0 No.1 entry in RX hopping table.
0x500x RX_HOP_TABLE_ENTRY_xx 1 Entries 2-63 in RX hopping table.
0x5041 RX_HOP_TABLE_ENTRY_64 2 No.3 entry in RX hopping table.
Common Properties
Number Name Default Summary

AN625
Rev. 0.1 7
3. Commands
3.1. Boot Commands
3.1.1. POWER_UP
Summary: Power-up device and mode selection. Modes include operational function
Purpose:
Power-up the device with the specified function. Power-up is complete when the CTS bit is set. This command may take
longer to set the CTS bit than other commands.
Command Stream
Reply Stream
Parameters:
PATCH - Select patch mode.
0 = Boot normally.
1 = Copy image selected by FUNC to RAM, but do not boot. After CTS is set, RAM may be patched via
PATCH_ARGS and PATCH_DATA commands.
FUNC[5:0] - Selects the boot function of the device
0 = Boot Loader
1 = Transceiver
TCXO - Select if TCXO is in use.
0 = XTAL is not TCXO.
1 = XTAL is TCXO.
XO_FREQ[31:0] - Frequency of TCXO or external crystal oscillator in Hz. The default is 30000000 (30MHz).
Range: 25000000 to 32000000
Response:
None
POWER_UPCommand 7 654321 0
CMD 0x02
BOOT_OPTIONS PATCH 0 FUNC[5:0]
XTAL_OPTIONS 0000000 TCXO
XO_FREQ XO_FREQ[31:24]
XO_FREQ XO_FREQ[23:16]
XO_FREQ XO_FREQ[15:8]
XO_FREQ XO_FREQ[7:0]
POWER_UPReply 76543210
CMD_COMPLETE CMD_COMPLETE[7:0]

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8 Rev. 0.1
3.1.2. PATCH_IMAGE
Summary: Loads image from NVM/ROM into RAM.
Purpose:
Loads the selected function into RAM for execution or patching
Command Stream
Reply Stream
Parameters:
FUNC[3:0] - Selects the image to load
0 = Boot Loader - No image is loaded
1 = Transceiver
Response:
None
PATCH_IMAGE Command 7 6 5 4 3 2 1 0
CMD 0x04
FLAGS 0000 FUNC[3:0]
PATCH_IMAGE Reply 7 6 5 4 3 2 1 0
CMD_COMPLETE CMD_COMPLETE[7:0]

AN625
Rev. 0.1 9
3.2. Common Commands
3.2.1. NOP
Summary: No operation command
Purpose:
Can be used to ensure communication with the device.
Command Stream
Reply Stream
Parameters:
None
Response:
None
NOPCommand 76543210
CMD 0x00
NOPReply 76543210
CMD_COMPLETE CMD_COMPLETE[7:0]

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10 Rev. 0.1
3.2.2. PART_INFO
Summary: Reports basic information about the device.
Purpose:
Returns Part Number, Part Version, ROM ID, etc
Command Stream
Reply Stream
Parameters:
None
Response:
CHIPREV[7:0] - Chip Mask Revision
PART[15:0] - Part Number. e.g. si4440 will return - 0x4440)
PBUILD[7:0] - Part Build
ID[15:0] - ID
CUSTOMER[7:0] - Customer ID
ROMID[7:0] - ROM ID
PART_INFO Command 7 6 5 4 3 2 1 0
CMD 0x01
PART_INFO Reply 7 6 5 4 3 2 1 0
CMD_COMPLETE CMD_COMPLETE[7:0]
CHIPREV CHIPREV[7:0]
PART PART[15:8]
PART PART[7:0]
PBUILD PBUILD[7:0]
ID ID[15:8]
ID ID[7:0]
CUSTOMER CUSTOMER[7:0]
ROMID ROMID[7:0]

AN625
Rev. 0.1 11
3.2.3. FUNC_INFO
Summary: Returns the Function revision information of the device.
Purpose:
Return Function revision numbers for currently loaded functional mode firmware. Contrast with PART_INFO
Command Stream
Reply Stream
Parameters:
None
Response:
REVEXT[7:0] - External revision number
Range: 0 to 255
REVBRANCH[7:0] - Branch revision number
Range: 0 to 255
REVINT[7:0] - Internal revision number
Range: 0 to 255
PATCH[15:0]
ID of applied patch. This is also the last 2 bytes in the associated patch file (*.csg).
0x0000 = No patch applied.
FUNC[7:0] - Current functional mode
1 = Tranceiver
2 = Receive only
3 = Transmit only
FUNC_INFOCommand 76543210
CMD 0x10
FUNC_INFO Reply 7 6 5 4 3 2 1 0
CMD_COMPLETE CTS[7:0]
REVEXT REVEXT[7:0]
REVBRANCH REVBRANCH[7:0]
REVINT REVINT[7:0]
PATCH PATCH[15:8]
PATCH PATCH[7:0]
FUNC FUNC[7:0]

AN625
12 Rev. 0.1
3.2.4. SET_PROPERTY
Summary: Sets the value of a property.
Purpose:
Sets a property common to one or more commands. These are similar to parameters for a api command but are not
expected to change frequently and may be controlled by higher layers of the user's software. Setting some properties
may not cause the device to take immediate action, however the property will take affect once a command which uses it
is issued.
Command Stream
Reply Stream
Parameters:
GROUP[7:0] - Selects the group of the property to set.
NUM_PROPS[7:0] - Number of properties to write starting at START_PROP.
Range: 1 to 12
START_PROP[7:0] - Selects the property index to set. The available properties are determined by the part number and
the POWER_UP :FUNC selection.
DATA0[7:0] - Value of the property START_PROP
DATA1[7:0] - Value of the property START_PROP + 1 (don't care if NUM_PROPS < 2 )
DATA2[7:0] - Value of the property START_PROP + 2 (don't care if NUM_PROPS < 3 )
DATA3[7:0] - Value of the property START_PROP + 3 (don't care if NUM_PROPS < 4 )
DATA4[7:0] - Value of the property START_PROP + 4 (don't care if NUM_PROPS < 5 )
SET_PROPERTYCommand 76543210
CMD 0x11
GROUP GROUP[7:0]
NUM_PROPS NUM_PROPS[7:0]
START_PROP START_PROP[7:0]
DATA0 DATA0[7:0]
DATA1 DATA1[7:0]
DATA2 DATA2[7:0]
DATA3 DATA3[7:0]
DATA4 DATA4[7:0]
DATA5 DATA5[7:0]
DATA6 DATA6[7:0]
DATA7 DATA7[7:0]
DATA8 DATA8[7:0]
DATA9 DATA9[7:0]
DATA10 DATA10[7:0]
DATA11 DATA11[7:0]
SET_PROPERTY Reply 7 6 5 4 3 2 1 0
CMD_COMPLETE CTS[7:0]

AN625
Rev. 0.1 13
DATA5[7:0] - Value of the property START_PROP + 5 (don't care if NUM_PROPS < 6 )
DATA6[7:0] - Value of the property START_PROP + 6 (don't care if NUM_PROPS < 7 )
DATA7[7:0] - Value of the property START_PROP + 7 (don't care if NUM_PROPS < 8 )
DATA8[7:0] - Value of the property START_PROP + 8 (don't care if NUM_PROPS < 9 )
DATA9[7:0] - Value of the property START_PROP + 9 (don't care if NUM_PROPS < 10 )
DATA10[7:0] - Value of the property START_PROP + 10 (don't care if NUM_PROPS < 11 )
DATA11[7:0] - Value of the property START_PROP + 11 (don't care if NUM_PROPS < 12 )
Response:
None

AN625
14 Rev. 0.1
3.2.5. GET_PROPERTY
Summary: Retrieve a property's value.
Purpose:
Retrieve a property's value; The value will either be the default or the value set with SET_PROPERTY.
Command Stream
Reply Stream
Parameters:
GROUP[7:0] - Selects the group of the properties to retrieve.
NUM_PROPS[7:0] - Number of properties to retrieve starting at START_PROP.
Range: 1 to 16
START_PROP[7:0] - Selects the first property index to retrieve. The available properties are determined by the part
number and the POWER_UP:FUNC selection.
GET_PROPERTYCommand 76543210
CMD 0x12
GROUP GROUP[7:0]
NUM_PROPS NUM_PROPS[7:0]
START_PROP START_PROP[7:0]
GET_PROPERTYReply76543210
CMD_COMPLETE CTS[7:0]
DATA0 DATA0[7:0]
DATA1 DATA1[7:0]
DATA2 DATA2[7:0]
DATA3 DATA3[7:0]
DATA4 DATA4[7:0]
DATA5 DATA5[7:0]
DATA6 DATA6[7:0]
DATA7 DATA7[7:0]
DATA8 DATA8[7:0]
DATA9 DATA9[7:0]
DATA10 DATA10[7:0]
DATA11 DATA11[7:0]
DATA12 DATA12[7:0]
DATA13 DATA13[7:0]
DATA14 DATA14[7:0]
DATA15 DATA15[7:0]

AN625
Rev. 0.1 15
Response:
DATA0[7:0] - Value of the property START_PROP
 DATA1[7:0] - Value of the property START_PROP + 1 (don't care if NUM_PROPS < 2 )
DATA2[7:0] - Value of the property START_PROP + 2 (don't care if NUM_PROPS < 3 )
DATA3[7:0] - Value of the property START_PROP + 3 (don't care if NUM_PROPS < 4 )
DATA4[7:0] - Value of the property START_PROP + 4 (don't care if NUM_PROPS < 5 )
DATA5[7:0] - Value of the property START_PROP + 5 (don't care if NUM_PROPS < 6 )
DATA6[7:0] - Value of the property START_PROP + 6 (don't care if NUM_PROPS < 7 )
DATA7[7:0] - Value of the property START_PROP + 7 (don't care if NUM_PROPS < 8 )
DATA8[7:0] - Value of the property START_PROP + 8 (don't care if NUM_PROPS < 9 )
DATA9[7:0] - Value of the property START_PROP + 9 (don't care if NUM_PROPS < 10 )
DATA10[7:0] - Value of the property START_PRO + 10 (don't care if NUM_PROPS < 11 )
DATA11[7:0] - Value of the property START_PROP + 11 (don't care if NUM_PROPS < 12
DATA12[7:0] - Value of the property STAT_PROP + 12 (don't care if NUM_PROPS < 13 )
DATA13[7:0] - Value of the property START_PROP + 13 (don't care if NUM_PROPS < 14 )
DATA14[7:0] - Value of the property START_PROP + 14 (don't care if NUM_PROPS < 15 )
DATA15[7:0] - Value of the property START_PROP + 15 (don't care if NUM_PROPS < 16 )

AN625
16 Rev. 0.1
3.2.6. GPIO_PIN_CFG
Summary: Configures the gpio pins
Command Stream
Reply Stream
Parameters:
GPIO0_PULL_CTL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
GPIO0_MODE[5:0]
0 = Do not modify the behavior of this pin.
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
5 = 32 kHz clock.
6 = 30 MHz clock.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
9 = Low when command complete, high otherwise.
10 = High when command overlap occurs. TODO: What clears this.
GPIO_PIN_CFGCommand7 6 543210
CMD 0x13
GPIO0 0 GPIO0_PULL_CTL GPIO0_MODE[5:0]
GPIO1 0 GPIO1_PULL_CTL GPIO1_MODE[5:0]
GPIO2 0 GPIO2_PULL_CTL GPIO2_MODE[5:0]
GPIO3 0 GPIO3_PULL_CTL GPIO3_MODE[5:0]
NIRQ 0 NIRQ_DRV_PULL NIRQ_MODE[5:0]
SDO 0 SDO_PULL_CTL SDO_MODE[5:0]
GEN_CONFIG 0 DRV_STRENGTH[1:0] 00000
GPIO_PIN_CFGReply 7 6 5 43210
CMD_COMPLETE CTS[7:0]
GPIO0 GPIO0_STATE X GPIO0r_[5:0]
GPIO1 GPIO1_STATE X GPIO1r_[5:0]
GPIO2 GPIO2_STATE X GPIO2r_[5:0]
GPIO3 GPIO3_STATE X GPIO3r_[5:0]
NIRQ NIRQSTATE X NIRQr_[5:0]
SDO SDOSTATE X SDOr_[5:0]
GEN_CONFIG X DRV_STRENGTH[1:0] XXXXX

AN625
Rev. 0.1 17
11 = Serial data out.
12 = Pulses high on power on reset.
13 = Pulses high when calibration timer expires.
14 = Pulses high when wakeup timer expires.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.
32 = High while in the transmit state.
33 = High while in the receive state.
34 = High while the rx fifo is almost full.
35 = High while the tx fifo is almost empty.
36 = High while the battery voltage is low.
37 = High when RSSI above clear channel assesment threshold, goes low on sync detect or exiting rx state.
38 = Toggles when hop occurs.
39 = Toggles when the hop table wraps.
GPIO1_PULL_CTL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
GPIO1_MODE[5:0]
0 = Do not modify the behavior of this pin.
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
5 = 32 kHz clock.
6 = 30 MHz clock.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
9 = Low when command complete, high otherwise.
10 = High when command overlap occurs. TODO: What clears this.
11 = Serial data out.
12 = Pulses high on power on reset.
13 = Pulses high when calibration timer expires.
14 = Pulses high when wakeup timer expires.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.

AN625
18 Rev. 0.1
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.
32 = High while in the transmit state.
33 = High while in the receive state.
34 = High while the rx fifo is almost full.
35 = High while the tx fifo is almost empty.
36 = High while the battery voltage is low.
37 = High when RSSI above clear channel assesment threshold, goes low on sync detect or exiting rx state.
38 = Toggles when hop occurs.
39 = Toggles when the hop table wraps.
GPIO2_PULL_CTL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
GPIO2_MODE[5:0]
0 = Do not modify the behavior of this pin.
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
5 = 32 kHz clock.
6 = 30 MHz clock.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
9 = Low when command complete, high otherwise.
10 = High when command overlap occurs. TODO: What clears this.
11 = Serial data out.
12 = Pulses high on power on reset.
13 = Pulses high when calibration timer expires.
14 = Pulses high when wakeup timer expires.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.
32 = High while in the transmit state.
33 = High while in the receive state.
34 = High while the rx fifo is almost full.

AN625
Rev. 0.1 19
35 = High while the tx fifo is almost empty.
36 = High while the battery voltage is low.
37 = High when RSSI above clear channel assesment threshold, goes low on sync detect or exiting rx state.
38 = Toggles when hop occurs.
39 = Toggles when the hop table wraps.
GPIO3_PULL_CTL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
GPIO3_MODE[5:0]
0 = Do not modify the behavior of this pin.
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
5 = 32 kHz clock.
6 = 30 MHz clock.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
9 = Low when command complete, high otherwise.
10 = High when command overlap occurs. TODO: What clears this.
11 = Serial data out.
12 = Pulses high on power on reset.
13 = Pulses high when calibration timer expires.
14 = Pulses high when wakeup timer expires.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.
32 = High while in the transmit state.
33 = High while in the receive state.
34 = High while the rx fifo is almost full.
35 = High while the tx fifo is almost empty.
36 = High while the battery voltage is low.
37 = High when RSSI above clear channel assesment threshold, goes low on sync detect or exiting rx state.
38 = Toggles when hop occurs.
39 = Toggles when the hop table wraps.
NIRQ_DRV_PULL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
NIRQ_MODE[5:0]
0 = Do not modify the behavior of this pin.

AN625
20 Rev. 0.1
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
11 = Serial data out.
12 = Pulses high on power on reset.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.
39 = Active low interrupt signal
SDO_PULL_CTL
0 = Disable pullup. Recommended setting if pin is driven.
1 = Enable pullup.
SDO_MODE[5:0]
0 = Do not modify the behavior of this pin.
1 = Input and output drivers disabled.
2 = CMOS output driven low.
3 = CMOS output driven high.
4 = CMOS input.
5 = 32 kHz clock.
7 = Divided MCU clock.
8 = High when command complete, low otherwise.
11 = Serial data out.
12 = Pulses high on power on reset.
14 = Pulses high when wakeup timer expires.
15 = unused0
16 = TX data CLK output to be used in conjuction with TX Data pin.
17 = RX data CLK output to be used in conjuction with RX Data pin.
18 = unused1
19 = TX data.
20 = RX data.
21 = RX raw data.
22 = Antenna 1 Switch used for antenna diversity.
23 = Antenna 2 Switch used for antenna diversity.
24 = High when a valid preamble is detected. Cleared when sync is received.
25 = High when an invalid preamble is detected. TODO: What clears this
26 = High when a sync word is detected. TODO: What clears this
27 = High when RSSI above clear channel assesment threshold, low when below threshold.