Wireless-tag SigmaStar SSD201 User manual

SigmastarSSD201/202
7-inch Smart Display User Manual
Revision History
Revision No.
Date
Description
V0.1
November 10, 2020
First release

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Contents
SigmastarSSD201/202........................................................................................................................ 1
7-inch Smart Display User Manual.....................................................................................................1
1. Overview......................................................................................................................................... 3
2. Technical Parameters.......................................................................................................................4
2.1 Hardware Parameters......................................................................................................... 4
2.2 Electrical Parameters..........................................................................................................5
2.3 Use Environment Parameters.............................................................................................5
3. Interface Description....................................................................................................................... 5
3.1 Motherboard Interface Diagram........................................................................................ 5
3.2 Power Interface/RS232/RS485.......................................................................................... 6
3.3 RGB Interface.................................................................................................................... 7
3.4 TP Interface........................................................................................................................ 9
3.5 Speaker Interface..............................................................................................................10
3.6 DMIC Interface................................................................................................................ 10
3.7 AUDIO Interface.............................................................................................................. 11
3.8 TF Card Interface............................................................................................................. 12
3.9 USB Interface...................................................................................................................12
3.10 Ethernet Interface...........................................................................................................12
3.11 WIFI Antenna................................................................................................................. 12
3.12 Debug Serial Interface................................................................................................... 12
3.13 ESP32-WROOM-32U................................................................................................... 13
3.14 Extension Interface（GPIO）....................................................................................... 14

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1. Overview
The 7-inch smart display motherboard is an ultra-small SoM (System on Module) module based
on SigmaStar SSD201/SSD202 SoC (ARM Cortex A7 processor), with the main frequency up to
1.2GHz, 256KB L2-Cache, built-in dual MAC, one PHY, and supporting dual 100M Ethernet
interfaces. The memory management supports DMA engine. It integrates H.264/AVC and
H.265/HEVC decoders and supports max. resolution FHD(1920x1080)/60 fps decode.
Figure 1. IDO-SMLCD71-V1-2EC product diagram
The 7-inch smart display is equipped with TTL display driver interface, TF card socket, Ethernet
MAC, audio interface, speaker interface, USB2.0 and WIFI. It is mainly used in the fields of smart
building indoor intercom, smart home central control, 86-box family central control, elevator floor
display, IP network broadcasting device and speech recognition equipment, etc.

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2. Technical Parameters
2.1 Hardware Parameters
Table 1. Hardware Parameters
Items
Specifications
CPU
SigmaStar SSD201/SSD202
ARM® Cortex-A7 dual-core processor, up to 1.2GHz
Video processor
supports max. resolution FHD(1920x1080)/60 fps decode. ，H.265/HEVC
decoder，I/P/B slices，all intra-prediction modes,
all inter-prediction modes ，supports max. resolution HD(1920x1080)/60 fps
decode.
RAM
Built-in DDR2/DDR3 memory, support auto-refresh and self- refresh modes,
64MB by default (up to 128MB)
Storage
Supports 1/2/4-bit SPI-NOR/SPI-NAND Flash ，128MB by default （up to
512MB）
OS
Linux
Ethernet
1-channel 10/100Mbps half duplex/full duplex Ethernet
WIFI
Equipped with Singmaster wifi chip (SSW101B), with high performance and
500m transmission distance in open space
Display
Video output interface:
-1 x RGB, support FHD (1920x1080)/60 fps decoding output, with
1024*600 IPS RGB module by default
Audio
1 x left and right channel speaker (PH-4 connector)
Serial port
1x DEBUG（PM_UART）
1 x RS232
1 x RS485
USB
1x USB 2.0（USB female）
TF card
1 x Micro SD card standard（support SDIO2.0）
RTC
1220 button battery, easy to maintain
Extension
interface
4 x GPIO

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Power input
Default USB TYPE-C power supply;
Optional 4.5~30V DC @1A power supply
PCBA dimensions
122mm x 73mm
2.2 Electrical Parameters
Table 2. Electrical parameters
2.3 Use Environment Parameters
Table 3. Use environment parameters
Operating temperature
-10~70℃
Storage temperature
-20~85℃
3. Interface Description
3.1 Motherboard Interface Diagram
Power range
Default USB TYPE-C power supply
Optional 4.5V~30V DC voltage, rated voltage 12V DC
Rated power
Undetermined

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Figure 2. Front interface diagram of the motherboard
3.2 Power Interface/RS232/RS485
The default supply voltage is 12V@1A, 8Pin horizontal PH2.0 connector is adopted, and the
voltage range is DC 4.5V~30V. In addition, the motherboard supports 1-channel RS232 and
1-channel RS485, and the pin definitions are shown in Table 4:
Figure 3. Power interface/RS232/RS485 pin diagram
Table 4. Power supply/RS232/RS485 pin definition
Pin No.
Pin definition
Description

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1
GND
Ground
2
GND
3
RS232_RX
UART/RS232 data communication, with Baud Rate up
to 115200bps
4
RS232_TX
5
RS485_B
UART/RS485 data communication, with Baud Rate up
to 115200bps
6
RS485_A
7
12V_IN
12V input
8
12V_IN
3.3 RGB Interface
RGB signal interface is led out by a 50Pin FPC0.5mm upper connector. The pin definitions are
shown in Table 5:
Figure 4. RGB signal interface pin diagram
Table 5. RGB signal interface pin definition
Pin No.
Pin definition
Description
1
LED+
LED Anode
2
LED+
3
LED-
LED Anode
4
LED-
5
GND
Ground
6
VCOM
Common Voltage
7
DVDD
Digital Power
8
MODE
DE/SYNC mode select. Normally pull high
H: DE mode. L: HSD/VSD mode
9
DE
Data Enable signal
10
VSD
Vertical sync input. Negative polarity

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11
HSD
Horizontal sync input. Negative polarity
12
B7
data bus
13
B6
14
B5
15
B4
16
B3
17
B2
18
B1
19
B0
20
G7
data bus
21
G6
22
G5
23
G4
24
G3
25
G2
26
G1
27
G0
28
R7
data bus
29
R6
30
R5
31
R4
32
R3
33
R2
34
R1
35
R0
36
GND
Ground
37
DCLK
Clock input
38
GND
Ground
39
SHLR
Left or Right Display Control
40
UPDN
Up / Down Display Control
41
VGH
Power supply for Gate on output
42
VGL
Power supply for Gate off output
43
AVDD
Analog Power
44
RSTB
Global reset pin. Active low to enter reset state.
Suggest to connecting with an RC reset circuit for
stability.

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Normally pull high. (R=10KΩ，C=1μF)
45
NC
No connection
46
VCOM
Common Voltage
47
DITHB
Dithering setting
DITH=”H” 6bit resolution(last 2 bit of input data
truncated)
DITH=”L” 8bit resolution(default setting)
48
GND
Ground
49
NC
No connection
50
NC
No connection
3.4 TP Interface
It provides one-way CTP (Capacitive Touch Panel) interface, which is used to connect a capacitive
screen through a 6Pin FPC 0.5mm bottom contact connector. TP interface is also designed to be
compatible with 4PinFPC 0.5mm interface resistive screen. The interface definitions are shown in
Table 6 and Table 7 respectively:
Figure 5. CTP pin diagram
Figure 6. RTP pin diagram
Table 6. CTP interface definition
Pin No.
Pin definition
Description
1
RST
Reset
2
VDD
3.3V
3
GND
Ground

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4
INT
TP reset signal
5
SDA
I2C bus data signal
6
SCL
I2C bus clock signal
Table 7. RTP interface definition
Pin No.
Pin definition
Description
1
X+
XR
2
Y+
YD
3
X-
XL
4
Y-
YU
3.5 Speaker Interface
The motherboard leads out a dual-channel speaker interface through a 4Pin PH2.0 horizontal
connector. Each channel supports 8ohm/1W speaker. The pin definitions of the speaker interface
are shown in Table 8.
Figure 7. Speaker interface diagram
Table 8. Speaker interface definition
Pin No.
Pin definition
Description
1
VOLN
Right channel speaker driver output
2
VOLP
3
VORN
Left channel speaker driver output
4
VORP
3.6 DMIC Interface
The motherboard leads out a digital microphone interface through a 10Pin horizontal PH2.0

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connector. The pin definitions of the speaker interface is shown in Table 9:
Figure 8. DMIC interface diagram
Table 9. DMIC interface definition
Pin No.
Pin definition
Description
1
3.3V
3.3V
2
GND
GND
3
NC
NC
4
GND
GND
5
DMIC_CLK
Clock signal
6
DMIC_R
7
DMIC_L
8
NC
NC
9
NC
10
NC
3.7 AUDIO Interface
The motherboard leads out an analog microphone interface through a 2Pin horizontal MX1.25
connector. The interface pin definitions are shown in Table 10:
Figure 9. DMIC interface diagram
Table 10. DMIC interface definition
Pin No.
Pin definition
Description
1
DMIC+
MIC Right channel input
2
DMIC-
MIC Left channel input

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3.8 TF Card Interface
It supports standard MicroSD memory cards and file systems such as FAT and EXT.
3.9 USB Interface
It provides 1-channel USB2.0, USB_A type female connector by default.
3.10 Ethernet Interface
It provides 1-channel Ethernet interface, 10/100Mbps adaptive.
3.11 WIFI Antenna
The circuit board uses an IPEX generation-one antenna connector. The antenna is shown in Figure
8:
Figure 10. Antenna diagram
3.12 Debug Serial Interface
UART_PM (TTL level) interface leads to PM_RX, PM_TX and GND through a 4Pin horizontal
PH2.0 connector. The pin definitions are shown in Table 11:
Figure 11. Debug interface pin diagram

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Table 11. Debug interface definition
Pin No.
Pin definition
Description
1
PM_TX
Connect directly to CPU pin, 3.3V level
2
PM_RX
Connect directly to CPU pin, 3.3V level
3
GND
Power ground
4
NC
NC
3.13 ESP32-WROOM-32U
The motherboard can achieve a wide range of communication connection by connecting an
external module Wi-Fi+BT+BLE MCU (ESP32-WROOM-32U). The programming interface of
the module is shown in the following table:
Figure 13. ESP32-WROOM-32U programming interface pin diagram
Table 12. ESP32-WROOM-32U programming interface definition
Pin No.
Pin definition
Default function
1
RX
Receive data
2
TX
Transmit data
3
GND
GND

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3.14 Extension Interface（GPIO）
Extension interface adopts a 6Pin PH2.0 connector. The interface definitions are shown in Table
13:
Figure 14. Extension interface pin diagram
Table 13. Extension interface pin definition
Pin No.
Pin definition
Default function
1
GND
GND
2
GPIO11
I/O
3
GPIO2
4
GPIO7
5
GPIO6
6
GND
GND
Order information:
Part Number
Description
IDO-SBC2D07-V1-21EC
(201-2GW), 201 board + 2G SPI NAND FLASH + WIFI + Bluetooth
IDO-SBC2D07-V1-22EC
(202-2GW), 202 board + 2G SPI NAND FLASH + WIFI + Bluetooth
IDO-SMLCD71-V1-2EC
TP201 board + 2G SPI NAND FLASH + WIFI + Bluetooth + 7" display
IDO-SMLCD72-V1-2EC
TP202 board + 2G SPI NAND FLASH + WIFI + Bluetooth + 7" display
Note: Above items don’t include the European 4G module.