CYPRES S6AL211A94 User manual

S6AL211A94
ASSP 4 ch LED Driver IC for Intelligent
Lighting Hardware Manual
Doc. No. 002-08545 Rev. *B
Cypress Semiconductor
198 Champion Court
San Jose, CA 95134-1709
www.cypress.com

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S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 2
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S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 3
Preface
Thank you for your continued use of Cypress semiconductor products.
Read this manual and "Data Sheet" thoroughly before using products in this series.
Purpose of this manual and intended readers
This manual explains the functions and operations of this product and describes how it is used. The manual is
intended for engineers engaged in the actual development of products using this product.
Note:
This manual explains the configuration and operation, but does not cover the specifics of each device in the
series. Users should refer to the respective data sheets of devices for device-specific details.

S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 4
Contents
1. Product Overview..........................................................................................................................................................5
2. About Corresponded UART Interface..........................................................................................................................6
2.1 Terminal connection..............................................................................................................................................7
2.2 Description of Functions........................................................................................................................................9
2.2.1 Data Format and Timing...........................................................................................................................9
2.2.2 Control Command...................................................................................................................................10
2.2.3 Memory Map...........................................................................................................................................11
2.3 Dimming Curve....................................................................................................................................................13
2.3.1 Logarithm Curve.....................................................................................................................................13
2.3.2 Linear Curve...........................................................................................................................................14
2.4 Trigger Input Dimming.........................................................................................................................................15
2.4.1 Trigger Signal .........................................................................................................................................15
2.4.2 Dimming Control.....................................................................................................................................15
Revision History...................................................................................................................................................................17
Document Revision History ...........................................................................................................................................17

S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 5
1. Product Overview
S6AL211A94 corresponds to these specifications.
Communication Interface: UART
VIN voltage: 24 V
Dimming type: C
Sensor input: motion sensor, ambient light sensor

S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 6
2. About Corresponded UART Interface
This product corresponds to UART communication interface for dimming and color control function.
Baud rate: 115.2 kbps ± 5 %
Asynchronous transfer mode, LSB first, NRZ format
Data length: 8-bit
Stop bit: 1-bit
Parity error: no parity

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 7
2.1 Terminal connection
Table 1. Terminal connection
Pin No.
Pin Name
I/O
Terminal Connection Place
1
DGND
-
Ground
2
BIAS2
O
Connect By-pass capacitor. ( Do not connect external load )
3
BIAS
O
Connect By-pass capacitor. ( Do not connect external load )
4
VIN
-
DC 24 V Power supply
5
DRV_1
O
Connect external switching FET1 gate of current control.
6
DRV_2
O
Connect external switching FET2 gate of current control.
7
VIN
-
DC 24 V Power supply
8
DRV_3
O
Connect external switching FET3 gate of current control.
9
DRV_4
O
Connect external switching FET4 gate of current control.
10
DIN1
I
Unused Pin
Input to VO pin output level.
11
DIN2
I
Unused Pin
Connect to GND level.
12
SCL
I/O
Unused Pin
Input to VO pin output level.
13
SDA
I/O
Unused Pin
Input to VO pin output level.
14
SH_1
O
Connect external switching FET1 gate of PWM dimming control.
15
SH_2
O
Connect external switching FET2 gate of PWM dimming control.
16
AGND
-
Ground
17
SH_3
O
Connect external switching FET3 gate of PWM dimming control.
18
SH_4
O
Connect external switching FET4 gate of PWM dimming control.
19
TEMP1
I
Connect Temperature sensor 1.
20
TEMP2
I
Connect Temperature sensor 2.
21
TEMP3
I
Connect Temperature sensor 3.
22
TEMP4
I
Connect Temperature sensor 4.
23
AGND
-
Ground
24
CS_1P
I
Connect LED current sense 1 of High side.
25
CS_1N
I
Connect LED current sense 1 of Low side.
26
CS_2P
I
Connect LED current sense 2 of High side.
27
CS_2N
I
Connect LED current sense 2 of Low side.
28
CS_3P
I
Connect LED current sense 3 of High side.
29
CS_3N
I
Connect LED current sense 3 of Low side.
30
CS_4P
I
Connect LED current sense 4 of High side.
31
CS_4N
I
Connect LED current sense 4 of Low side.
32
PCNT
O
IC status output Pin
33
TEST
I
Exclusive use of the Test
Connect to BIAS3Pin.
34
IF1
I
UART Communication interface data input Pin
35
IF2
O
UART Communication interface data output Pin
36
AGND
-
Ground
37
SENSE1
I
Unused Pin
Connect to GND level.
38
SENSE2/ADD2
I
Unused Pin
Connect to GND level.

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 8
Pin No.
Pin Name
I/O
Terminal Connection Place
39
SENSE3/ADD3
I
Ambient light sensor
connection Pin
Please connect to GND level if you do not use the function.
40
SENSE4/ADD4
I
Motion sensor connection Pin
Please connect to GND level if you do not use the function.
41
ADD5
I
Unused Pin
Connect to GND level.
42
ADD6
I
Unused Pin
Connect to GND level.
43
ADD7
I
Unused Pin
Connect to GND level.
44
ADD8
I
Unused Pin
Connect to GND level.
45
SP
I
Exclusive use of the Test
Connect to BIAS 3Pin.
46
BIAS 3
O
Connect By-pass capacitor. ( Do not connect external load )
47
AGND
-
Ground
48
VO
O
3 V LDO output Pin
Connect Temperature sensor of power supply side.
Connect Other 3 V loads.

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 9
2.2 Description of Functions
2.2.1 Data Format and Timing
The data format and timing of the UART communication is shown below.
Figure 1. UART Data Format and Timing
Data to be transmitted and received, all are treated as ASCII character code.
Valid send and receive data is numbers and uppercase and control characters.
Received data length is within 24 byte.When continuous reception<CR>(ASCII code:0Dh) and <LF>(ASCII
code:0Ah) within 24 byte, it is interpreted as the delimiter of receive data. Next received data of continuous
reception of<CR>, <LF>are treated as 1st byte data.
If there is no delimiter is within 24 byte, received data of 24 byte will be discarded. And 25th received byte
data are treated as 1st byte data.
If the received string is a valid control commands, this device output response.
IF1
> 1ms t (s)
24 characters or less
S ASCII code P S ASCII code P S 0Dh(=<CR>) P S 0Ah(=<LF>) P
IF1
IF2
S 0Ah(=<LF>) P S
t (s)
S4Fh(=”O”)P S 4Bh(=”K”)P S 0Dh(=<CR>) P S 0Ah(=<LF>) P
≦4ms
≒2ms > 0s
S Start bit
P Stop bit

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 10
2.2.2 Control Command
First six characters of the received string are treated as a control command.
The argument is only valid ASCII character code A, B, C, D, E, F and 0-9.When it received an invalid value
will be treated as receiving a "0".
Please send a space character in front of the argument.
Table 2. Control Commands
Command
Argument
Function
Response
DIMSET
1st : ch1 dimming level
Set the dimming level on each channel.
ex. ) DIMSET FF AA FF 93<CR><LF>
OK<CR><LF>
2nd : ch2 dimming level
3rd : ch3 dimming level
4th : ch4 dimming level
MEMSET
1st : write address
Write data to the memory.[1]
ex. ) MEMSET 3055<CR><LF>
OK<CR><LF>
2nd : write data
QUERYS
1st : read address
Read from memory.
ex. ) QUERYS 24<CR><LF>
Read Data or "TRUE"
or "FALSE"＋
<CR><LF>
WAKEUP
No argument
Return to the normal dimming operation state from
the standby state.[2]
This command is ignored when the state is not the
standby.
OK<CR><LF>[3]
PRESET
No argument
Initialize the device when the light is off bye
protection.
This command is ignored when the light is not off
bye protection.
OK<CR><LF>
SELECT
1st : slave address
Select the slave device.
When the argument matches the parameter
"SLAVE ADDRESS", all commands is accepted.
When the argument don't match the parameter
"SLAVE ADDRESS",it is accepted only command
of WAKEUP and SELECT.
If the received argumentis "FF", regardless of the
setting value of "SLAVE ADDRESS", all
commands is accepted.
If the received
argument is "FF" or the
value of "SLAVE
ADDRESS", output the
response
"OK<CR><LF>".
(Others)
－
It is determined that the invalid command, input is
ignored.
No response
[1]: Write data to excluding the address "0x10" is stored in non-volatile memory. Therefore, please do not
power-off from the transmission of the MEMSET command within 5 seconds. If power is lost within 5 seconds,
the write data is not guaranteed.
[2]: Unless setting to illuminate within 3 seconds after receiving the WAKEUP command, it moves again to
the standby state.
[3]: When receive at standby state, this device outputs the response within 4 ms from the first character.

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 11
2.2.3 Memory Map
Table 3. Memory Map
Address
Bit
Parameter Name
R/W
Initial
Value
Feature Description
0x00
[7:0]
POWER ON LEVEL1
R/W
00h
Power-on Dimming level of ch.1
0x01
[7:0]
POWER ON LEVEL2
R/W
00h
Power-on Dimming level of ch.2
0x02
[7:0]
POWER ON LEVEL3
R/W
00h
Power-on Dimming level of ch.3
0x03
[7:0]
POWER ON LEVEL4
R/W
00h
Power-on Dimming level of ch.4
0x04
[7:0]
FADE TIME
R/W
00h
Fade time
00h : no fade
01h :0.5 s
02h :1 s
03h : 2 s
Others: invalid
0x05
[7:4]
reserved
R/W
0000
-
[3]
DIMMING CURVE4
1
Dimming curve of each channel
0 : Log curve
1 : Linear curve
[2]
DIMMING CURVE3
1
[1]
DIMMING CURVE2
1
[0]
DIMMING CURVE1
1
0x06
[7:4]
reserved
R/W
0000
-
[3]
DIMMING ENABLE4
1
Dimming of each channel
0 : Disable
1 : Enable
Note: Please set to "0" to not use channel.
[2]
DIMMING ENABLE3
1
[1]
DIMMING ENABLE2
1
[0]
DIMMING ENABLE1
1
0x10
[7:1]
reserved
R/W
0000000
-
[0]
MOTION SENSOR
SWITCH
1
Dimming by the trigger input
0 : Disable
1 : Enable
Note: This setting is not written to non-volatile
memory.
0x11
[7:4]
reserved
R/W
0000
-
[3]
MOTION SENSOR
CHECK TIME
0
Time to move to the standby state
0 : 10 s
1 : 5 min
[2]
ILLUMINANCE
SENSOR ENABLE
0
Illumination sensor input
0 : no input
1 : input
[1:0]
MOTION SENSOR
MODE
00
Select the trigger input
2'b00 : trigger input disable
2'b01 : trigger input by motion sensor
(SENSE4-pin input)
2'b1* : trigger input by UART
communication[1]
(motion sensor input disable)
0x12
[7:0]
ILLUMINANCE
SENSOR LOWER DATA
R
-
Illumination sensor Lower 8 bit data
[0-5V input, 10 bit A/D convert]
0x13
[7:2]
reserved
R
000000
-
[1:0]
ILLUMINANCE
SENSOR UPPER DATA
-
Illumination sensor upper 2 bit data
[0-5 V input, 10 bit A/D convert]
0x20
[7:0]
ACTUAL LEVEL1
R
-
Current dimming level of ch.1
0x21
[7:0]
ACTUAL LEVEL2
R
-
Current dimming level of ch.2
0x22
[7:0]
ACTUAL LEVEL3
R
-
Current dimming level of ch.3
0x23
[7:0]
ACTUAL LEVEL4
R
-
Current dimming level of ch.4

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 12
Address
Bit
Parameter Name
R/W
Initial Value
Feature Description
0x24
[7:0]
LAMP FAILURE
LEVEL1
R
-
Protection status 1
[Output over current, Input low voltage,
External over temperature, Internal over
temperature]
Protection state: Output the response
"TRUE", when read this address.
Not protection state: Output the response "
FALSE ", when read this address.
0x25
[7:0]
LAMP FAILURE
LEVEL2
R
-
Protection status 2
[Light out protection excluding Protection
status 1]
Protection state: Output the response
"TRUE", when read this address.
Not protection state: Output the response "
FALSE ", when read this address.
0x30
[7:0]
COMMENT0
R/W
00h
For free use
0x31
[7:0]
COMMENT1
R/W
00h
For free use
0x32
[7:0]
COMMENT2
R/W
00h
For free use
0x33
[7:0]
COMMENT3
R/W
00h
For free use
0x34
[7:0]
COMMENT4
R/W
00h
For free use
0x35
[7:0]
COMMENT5
R/W
00h
For free use
0x36
[7:0]
COMMENT6
R/W
00h
For free use
0x37
[7:0]
COMMENT7
R/W
00h
For free use
0x40
[7:0]
SLAVE ADDRESS
R/W
FFh
Slave address
0xFE
[7:0]
reserved
R
-
-
[1]: Please refer to the chapter "2.4 Trigger Input Dimming".

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 13
2.3 Dimming Curve
2.3.1 Logarithm Curve
Figure 2. Formula of Logarithm Dimming Curve
X(n)
= 10 254
n
-1 - 1
/3
Figure 3. Logarithm Dimming Curve
(%)

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 14
2.3.2 Linear Curve
Figure 4. Formula of Linear Dimming Curve
X(n) = ・100
255
n
Figure 5. Linear Dimming Curve
(%)

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 15
2.4 Trigger Input Dimming
It controls the lights on and off by a trigger signal input.
2.4.1 Trigger Signal
By the parameter setting values of "MOTION SENSOR MODE" and "MOTION SENSOR SWITCH", can be
selected a trigger signal.
"MOTION SENSOR SWITCH" setting is not stored in non-volatile memory. It can switch to enable or disable
temporarily control.
Table 4. Trigger Signal
Parameter Name
MOTION SENSOR
MODE
MOTION
SENSOR
SWITCH
Select the trigger signal
bit1
bit0
bit0
Setting
0
0
-
Control by the trigger input is invalid
0
1
0
Control by the trigger input is invalid
1
SENSE4 pin trigger input
1
-
0
Control by the trigger input is invalid
1
UART communication (valid received string)
2.4.2 Dimming Control
<Control by SENSE4 pin trigger input>
This device return to the normal dimming operation state from standby state when it detects the input "H",
and it lights in the brightness of before the lights off.
After the change input to "L", lighting is continued until over time that has been set "MOTION
SENSOR CHECK TIME".
After the set time the light turn off, and this device moves to the standby state to reduce the power
consumption.
When it detects the input "H" again during the set time, the timer that counts the set time is cleared.
Because immediately after the power is turned on unstable output of the motion sensor, ignores the
trigger input for 30 seconds.
When the power is turned on, it lights in the brightness of the "POWER ON LEVEL" setting.
In addition to the 30 seconds, lighting is continued until over time that has been set "MOTION
SENSOR CHECK TIME".
<Control by UART communication>
This device return to the normal dimming operation state from standby state when it receives the
command "WAKEUP<CR><LF>", and it lights in the brightness of before the lights off.
If there is a valid received string within the set time (="MOTION SENSOR CHECK TIME"), the
lighting is continued. (Recommend the "WAKEUP<CR><LF>" as a valid received string)
If there is no valid received string until over the set time, the light turn off and this device moves to
the standby state to reduce the power consumption.
30 seconds from power-on, it lights if there is no valid received string.
When the power is turned on, it lights in the brightness of the "POWER ON LEVEL" setting.
In addition to the 30 seconds, lighting is continued until over time that has been set "MOTION
SENSOR CHECK TIME".

About Corresponded UART Interface
S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 16
Figure 6. Trigger Input Dimming
t (s)
SENSE4
Sense timing ↑↑↑↑↑・・・・ ↑↑↑↑↑↑↑・・・・ ↑
LED
target brightness
t (s)
FADE TIME MOTION SENSOR
CHECK TIME MOTION SENSOR
CHECK TIME
counter start
counter clear
IF1 WAKEUP<CR><LF> WAKEUP<CR><LF> WAKEUP<CR><LF>
LED
target brightness
t (s)
FADE TIME
MOTION SENSOR
CHECK TIME
Standby transition
wait time
Standby state
Standby transition
wait time
Standby state
t (s)

S6AL211A94, ASSP 4ch LED Driver IC for Intelligent Lighting Hardware Manual, Doc. No. 002-08545 Rev. *B 17
Revision History
Document Revision History
Document Title: S6AL211A94, ASSP 4 ch LED Driver IC for Intelligent Lighting Hardware Manual
Document Number: 002-08545
Revision
Issue Date
Origin of
Change
Description of Change
**
02/10/2015
HSAT
Initial Release
*A
05/30/2016
HSAT
Migrated Spansion guide “MN405-00002-1v0-E“to Cypress format
*B
01/17/2018
SSAS
Updated the Cypress logo and legal.
Completing Sunset Review.