LED Control IC
W2RG012RN
Optimal IC for LED Control
• An exponential function-based PWM gradation control for up to
256 gradations, enabling beautiful fade-in and fade-out.
• Dynamic drive of LEDs connected in a matrix form; individual
control of up to 128 LED Lines.
• Serial bus connection permitting connection of up to 15 ICs on
the same communication line.
• 24 constant current outputs contained in a small package of
7 x 7 mm.
• Built-in thermal shutdown.
• RoHS Compliant
Ordering Information
Description
LED Control IC
Model
W2RG012RN
Specifications
Absolute Maximum Ratings
Item
Symbol
Rating
Applicable Terminal
Supply Voltage
VDD
-0.3 to 7.0 V
VDD
Input Voltage
VIN
-0.3 to VDD + 0.3 ≤ 7.0 V
Signal Output Voltage
Drive Output Voltage
Drive Output Current/pin
(See note 1)
Switch Output Current/pin
VSOUT
VDOUT
-0.3 to VDD + 0.3 ≤ 7.0 V
-0.3 to 20 V
SDA, SCL, RST, CE, ADR1, ADR0, DIV, COM
SDO, OUTDC
OUT0R~7R, OUT0G~7G, OUT0B~7B, OUTS0~S3
IDOUT
80 mA
OUT0R~7R, OUT0G~7G, OUT0B~7B
IDOUTS
Pd1
Pd2
Pd3
TOPR
TSTG
20 mA
3.43 W
1.80 W
1.16 W
-20 to 85 °C
-40 to 150 °C
OUTS0~S3
-----------
Allowable Power Dissipation
(See note 2)
Ambient Operating Temperature
Ambient Storage Temperature
Note: 1. Take the power consumption and allowable power dissipation rating into consideration.
2. Values when the product is mounted on a standard substrate (70 mm x 70 mm x1.6 mmt, FR-4).
When using the product at Ta = 25°C or higher, the values must be decreased using the constant of temperature decrease Rtd [mW/°C].
Pd1: Rtd = 27.4 mW/°C for a double-sided substrate with a back layer copper foil area of 4,900 mm2
Pd2: Rtd = 14.4 mW/°C for a double-sided substrate with a back layer copper foil area of 225 mm2
Pd3: Rtd = 9.28 mW/°C for a single-sided substrate with a copper foil area of 36 mm2
Curve of Heat Reduction Ratio
Back copper foil: 4,900 mm2
Allowable dissipation (mW)
3430
Back copper foil:
225 mm2
1800
Copper foil:
36 mm2
1160
0
25
85
Ambient Temperature (°C)
150
LED Control IC
W2RG012RN
1
Recommended Operating Conditions
Symbol
Rating
Applicable Terminal
Supply Voltage
Input Voltage
Item
VDD
3.0 to 5.5 V
VDD
VIN
0 to VDD V
Signal Output Current
Communication Clock Frequency (See note 1)
ISOUT
fSCL
-10 to 10 mA
Max. 5 MHz
SDA, SCL, RST, CE, ADR1, ADR0, DIV, COM
SDO, OUTDC
SCL
Note: 1. Take the timing characteristics into consideration.
DC Electrical Characteristics (Ta = 25°C, VDD = 5V)
Spec.
Typ.
Item
Symbol
Condition
High-level Input Voltage
VIH
---
VDD x 0.7
---
---
V
Low-level Input Voltage
VIL
---
---
---
VDD x 0.3
V
VAD1
“10” output
VDD x 0.9
---
VDD + 0.3
V
VAD2
“11” output
VDD x 0.6
---
VDD x 0.7
V
VAD3
“01” output
VDD x 0.3
---
VDD x 0.4
V
A/D Input Voltage
Min.
Max.
Unit
VAD4
“00” output
-0.3
---
VDD x 0.1
V
High-level Signal Output Voltage
VSOH
ISOUT = -5 mA
VDD - 0.5
---
---
V
Low-level Signal Output Voltage
VSOL
ISOUT = 5 mA
---
---
0.5
V
Applicable
terminal
SDA, SCL, RST, CE
ADR1, ADR0, DIV, COM
SDO, OUTDC
ON Resistance1
RON1
---
---
6.3
10
Ω
Inter-pin Current Accuracy
ΔIP
IDOUT = 20 mA
-3
---
3
%
Inter-device Current Accuracy
ΔID
IDOUT = 20 mA
-6
---
6
%
Drive Output Leak Current
IDL
---
---
---
1
μA
ON Resistance2
RON2
---
---
9
20
Ω
OUTS0~S3
Operating Current Consumption
IDD
Total Output: IDOUT = 20 mA
---
5
7
mA
VDD
Min.
Spec.
Typ.
Max.
Unit
Applicable
terminal
SCL
Timing Characteristics
OUT0R~7R
OUT0G~7G
OUT0B~7B
(Ta = -20 to 85 °C, VDD = 3.0 to 5.5V)
Serial Communication with Address
Item
Symbol
Condition
Communication Clock
Pulse Width
tSCL
---
100
---
---
ns
Data Setup Time
tSDA_SU
---
90
---
---
ns
Data Hold Time
tSDA_HD
---
90
---
---
ns
CE Setup Time
tCE_SU
---
50
---
---
ns
CE Hold Time
Data Output Time
tCE_HD
---
50
---
---
ns
tSDO
Load capacity: 100 pF
---
---
80
ns
SCL, SDA, CE
SDA
50 %
tSDA_SU
tSDA_HD
SCL
50 %
tSCL
tSCL
tSDO
SDO
CE
2
LED Control IC
SCL,SDA
50 %
tCE_SU
W2RG012RN
tCE_HD
50 %
SCL, SDO
I2C-based Serial Communication
Item
Min.
Spec.
Typ.
Max.
---
50
---
---
ns
---
50
---
---
ns
tBUF
---
80
---
---
ns
tSU;STA
---
50
---
---
ns
Symbol
Condition
Clock “L” Period
tLOW
Clock “H” Period
tHIGH
Bus Freeing Time
Start Setup Time
Unit
Start Hold Time
tHD;STA
---
50
---
---
ns
Stop Setup Time
tSU;STO
---
50
---
---
ns
Data Setup Time
tSU;DAT
---
30
---
---
ns
Data Hold Time
tHD;DAT
---
0
---
---
ns
CE Setup Time
tSU;CE
---
50
---
---
ns
CE Hold Time
Data Output Time
tHD;CE
---
50
---
---
ns
tSDO
Load capacity: 100 pF
---
---
80
ns
Applicable
terminal
SCL
SDA
SCL,SDA
SCL, SDA, CE
SCL, SDO
70 %
30 %
SDA
tBUF
tLOW
70 %
30 %
SCL
P
S
tHD;STA
tHD;DAT
tHIGH
tSDO
Sr
tSU;DAT
tSU;STA
tSU;STO
P
70 %
30 %
SDO
tHD;CE
tSU;CE
CE
70 %
30 %
Engineering Data
Block Diagram
Filter
COM
ADR1
ADR0
A/D
RST
Filter
A/D
Gradation control0R
A/D
Gradation control0G
Gradation control0B
Gradation control1R
Gradation control1G
Gradation control1B
.
.
.
.
.
.
Reset
Gradation control7R
Gradation control7G
VDD
CAP
GND
Gradation control7B
Internal
power
supply
Internal
oscillation
circuit
Current setting
circuit
Clock
division
circuit
OUTS0
OUTS1
OUTS2
OUTS3
Open drain
output circuit
Communication circuit
Filter
Constant current output circuit
Filter
Output switch circuit
SCL
SDA
CE
SDO
OUTDC
Matrix
control
circuit
Data selector
A/D
Register
DIV
.
.
.
.
.
.
.
OUT0R
OUT0G
OUT0B
OUT1R
OUT1G
OUT1B
OUT7R
OUT7G
OUT7B
Thermal
shutdown
circuit
System
clock
REXTR REXTG REXTB
LED Control IC
W2RG012RN
3
Terminal Designation
Terminal Number
1
2
Terminal Name
SDA
SCL
Description
Serial data input
Serial clock input
I/O
I
I
3
Chip enable input (See note 1)
I
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
CE
VDD
CAP
GND
ADR1
ADR0
DIV
COM
REXTR
REXTG
REXTB
OUT0R
OUT0G
OUT0B
GND
OUT1R
OUT1G
OUT1B
OUT2R
OUT2G
GND
OUT2B
OUT3R
OUT3G
OUT3B
OUT4R
OUT4G
OUT4B
GND
OUT5R
OUT5G
OUT5B
OUT6R
OUT6G
GND
OUT6B
OUT7R
OUT7G
OUT7B
OUTS0
OUTS1
OUTS2
OUTS3
OUTDC
SDO
Power source
Capacitor (See note 2)
Ground
Device address 1
Device address 0
Division mode
Communication mode
Current setting resistance R
Current setting resistance G
Current setting resistance B
Output 0R
Output 0G
Output 0B
Ground
Output 1R
Output 1G
Output 1B
Output 2R
Output 2G
Ground
Output 2B
Output 3R
Output 3G
Output 3B
Output 4R
Output 4G
Output 4B
Ground
Output 5R
Output 5G
Output 5B
Output 6R
Output 6G
Ground
Output 6B/Output switch 4
Output 7R/Output switch 5
Output 7G/Output switch 6
Output 7B/Output switch 7
Output switch 0
Output switch 1
Output switch 2
Output switch 3
Synchronous control output
Serial data output
P
--P
I
I
I
I
------O
O
O
P
O
O
O
O
O
P
O
O
O
O
O
O
O
P
O
O
O
O
O
P
O
O
O
O
O
O
O
O
O
O
48
RST
Reset (See note 3)
I
Function
CMOS, filter
Resistance partial
pressure input
Constant Current
Constant Current
Constant Current
Constant Current
Constant Current
N-ch open drain
CMOS
CMOS, filter, pull-up
Note: 1. When CE terminal is not used, keep it in L fixing condition. (This does not apply to CE-D8 mode.)
2. CAP terminal is connected to capacitor for power smoothing. Connect a 0.1 μF capacitor between the terminal and GND.
3. A 100 kΩ pullup resistance is built in the RST terminal. It is recommended that when the terminal is not used, a 0.1 μF capacitor be connected
between the terminal and GND to ensure stable operation.
4. Leave unused output terminals open.
4
LED Control IC
W2RG012RN
Operation
■ Functional Overview
LEDs in 24 systems are driven at a constant current or voltage. Also, LEDs connected in a matrix form can be lit dynamically (pulse lighting). For
dynamic lighting, LEDs in 48 systems (divided into 2 parts), 96 systems (divided into 4 parts), or 128 systems (divided into 8 parts) can be gradation
controlled individually.
Command Reception
An LED lighting command is received via serial communication. Regarding communication method, the product can adapt to three kinds of serial
communication with address, and I2C-based serial communication. LED lighting data for up to 128 units can be transmitted continuously. As only
a single operation is required for designation of a start signal or a device address, the overall volume of communication can be reduced.
Gradation Control
A 256-gradation can be used for lighting. Each gradation is allocated to a duty ratio based on the exponential function, to enable lighting design
suited to human visual sensation.
Matrix Control
The product is adapted to connection of 24x1, 24x2, 24x4 and 16x8 matrix. Also, lighting errors at switching can be controlled by controlling switch
timing for dynamic lighting.
Power-saving Control
For driving, power consumption for LED lighting is controlled to 75%/50%25% of the normal level. Collective switching via communication command
can be executed, permitting easy switching between normal and power-saving operations. Either current control or duty ratio control can be selected as control method. For current control, the output current is changed to a 75%/50%/25% level, with the current set with current setting terminal
REXTR/REXTG/REXTB as reference. For duty ratio control, the output duty ratio is changed to a 75%/50%/25% level, with the duty ratio allocated
to a gradation as reference.
Number of Control Systems
Up to 15 devices can be connected through address designation. This permits the control of LEDs in up to 1,920 systems. Additional devices can
be connected by switching the CE terminal.
■ Description of Terminals
Setting By Inputting Resistance Partial Pressure
Device address setting terminal (ADR1/ADR0), division mode setting terminal (DIV), and communication mode setting terminal (COM) are level
input terminals with an A/D converter built in internal IC. One of 4 voltage levels (GND, VDD x 1/3, VDD x 2/3, and VDD) is set by inputting resistance
partial pressure.
Device Address Setting
Selection of Division Mode
The device address is set by inputting resistance partial pressure to
device address setting terminal (ADR1/ADR0). The address is chosen from among 15 addresses from “0000” to “1110”. “1111” cannot
be designated to any device, as it is used for collective designation to
all devices in communication. The relationship between device
address and ADR terminal voltage is shown in the table below.
The matrix configuration for connected LEDs is set by inputting resistance partial pressure to devision mode setting terminal (DIV). The
relationship between matrix configuration and DIV terminal voltage is
shown in the table below.
Device Address
ADR1
ADR0
0000
GND
GND
0001
GND
VDD x 1/3
0010
GND
VDD
0011
GND
VDD x 2/3
0100
VDD x 1/3
GND
0101
VDD x 1/3
VDD x 1/3
0110
VDD x 1/3
VDD
0111
VDD x 1/3
VDD x 2/3
1000
VDD
GND
1001
VDD
VDD x 1/3
1010
VDD
VDD
1011
VDD
VDD x 2/3
1100
VDD x 2/3
GND
1101
VDD x 2/3
VDD x 1/3
1110
VDD x 2/3
VDD
1111 (reserved)
VDD x 2/3
VDD x 2/3
Matrix configuration
DIV
24 x 1
GND
24 x2
VDD x 1/3
24 x 4
VDD
16 x 8
VDD x 2/3
LED Control IC
W2RG012RN
5
Selection of Division Mode (continued)
Selection of Communication mode
The function of output terminal varies according to matrix configuration. The relationship between matrix configuration and terminal
function is shown in the table below.
The communication mode is set by inputting resistance partial pressure to communication mode setting terminal (COM). The relationship between communication mode and COM terminal voltage is
shown in the table below.
Output
terminal
Matrix Configuration
24 x 1
24 x 2
24 x 4
16 x 8
Communication mode
COM
OUT0R
OUT0R
Serial communication with address (SP-D8)
GND
OUT0G
OUT0G
Serial communication with address (SP-D7)
VDD x 1/3
OUT0B
OUT0B
I2C-based serial communication (I2C)
VDD
OUT1R
OUT1R
Serial communication with address (CE-D8)
VDD x 2/3
OUT1G
OUT1G
OUT1B
OUT1B
OUT2R
OUT2R
OUT2G
OUT2G
OUT2B
OUT2B
OUT3R
OUT3R
OUT3G
OUT3G
OUT3B
OUT3B
OUT4R
OUT4R
OUT4G
OUT4G
OUT4B
OUT4B
OUT5R
OUT5R
OUT5G
OUT5G
(Not used)
OUT5B
OUT5B
(Not used)
OUT6R
OUT6R
(Not used)
OUT6G
OUT6G
(Not used)
OUT6B
OUT6B
OUTS4
OUT7R
OUT7R
OUTS5
OUT7G
OUT7G
OUTS6
OUT7B
OUT7B
OUTS0
OUTS7
OUTS0
OUTS1
(Not used)
OUTS2
(Not used)
(Not used)
OUTS1
OUTS2
OUTS3
(Not used)
(Not used)
OUTS3
Setting of Drive Current
Constant Current Drive
Current can be set individually for 3 groups (R/G/B). Current is set by connecting current setting resistance terminal (REXTR/REXTG/REXTB) to
GND through external REXT resistance (See note 1). The relationship between current and REXT resistance is shown below.
Current (mA)
Current vs. REXT resistance
80
70
60
50
40
30
20
10
0
0
50
100
150
200
250
REXT resistance (kΩ)
300
Current
(mA)
REXT
resistance
(kΩ)
10
256
15
171
20
128
25
102
30
85.3
40
64.0
50
51.2
60
42.7
70
36.6
80
32.0
Formula for Current Setting
Recommended Operating Conditions
IDOUT (mA) = 2,560/REXT resistance (kΩ)
IDOUT: 10 ~ 80 mA (momentary value).
Note: 1. The current that is set is a momentary value. When LEDs are composed into a matrix, the effective value is calculated by dividing the original value by the matrix’s
division number. For example, when current is set at 60 mA in a 24x4 configuration, the effective value is 15 mA (= 60 mA/4).
2. The effective value is: IDOUT/division number.
6
LED Control IC
W2RG012RN
Constant Voltage Drive
Current can be set individually for output terminals in 24 systems (OUT0R ~ 7R,/ OUT0G ~ 7G/OUT0B ~ 7B). To set current individually, resistance
is put in series relative to the LED to be lit. Current setting resistance terminal (REXTR/REXTG/REXTB) is connected to REXT resistance with
which current becomes higher than the operating current. The relationship between current and series resistance/REXT resistance is shown below.
Formula for Current Setting
IDOUT (mA) = Supply voltage (V) / (Series resistance (Ω) + On resistance 6.3 Ω) < 2,560 / REXT resistance (kΩ)
Reset
When the input to reset terminal (RST) is L, all internal circuits are reset. Each buffer passes into the initial condition; the constant current output
terminal and the open drain output terminal into open output; and CMOS output terminal into L output. When the input is changed from L to H,
operation is resumed from the initial condition.
■ Communication Specifications
This IC can adapt to 4 communication modes. The communication mode is set with communication mode setting terminal (COM).
Serial Communication with Address (SP-D8 Mode)
Communication is started with a 9-bit start signal. Communication stability is enhanced by inserting a separator into data at intervals of 8 bits.
Serial Communication with Address (SP-D7 Mode)
Communication is started with an 8-bit start signal. Communication stability is enhanced by inserting a separator into data at intervals of 7 bits.
Serial Communication with Address (CE-D8 Mode)
The start and termination of communication is controlled with chip enabled signals. This communication mode is adapted to general-purpose serial
parallel interface.
I2C Mode Communication (I2C Mode)
This communication mode conforms to general-purpose I2C communication protocol.
The name and communication format of each communication mode are shown below.
Name of communication mode
Abbreviation
Start Signal
Stop Signal
Separator
Data Width
Response
8
ACK
(NACK)
ACK
(NACK)
Serial communication with address (SP-D8 mode)
SP-D8
“1 1111 1111 0”
“1 1111 1111”
0: continuation
1: termination
Serial communication with address (SP-D7 mode)
SP-D7
“1111 1111 0”
“1111 1111”
0: continuation
1: termination
7
Serial communication with address (CE-D8 mode)
CE-D8
CE fall
CE rise
(None)
8
SYN
8
ACK
(NACK)
I2C-based serial communication (I2C mode)
I 2C
I2C standard-based I2C standard-based I2C standard-based
Start Signal:
Communication is initialized, whether in wait or communication, into the device selection data wait condition.
Stop Signal:
Communication is terminated, and passes into the start signal wait condition. In SP-D8/SP-D7, procedures to terminate communication
(transmitting “1” to separator/transmitting a stop signal) can be omitted by transmitting a start signal after transmitting gradation data.
Separator:
This bit is inserted into transmitted data. In SP-D8/SP-D7, communication is terminated by transmitting “1” to separator, and passes into the
stop/start signal wait condition. In I2C, separator is allotted to ACK response.
Data Width:
Data width refers to the bit width of transmitted data. In SP-D7, data that can be designated are restricted (no word length designation, designation
of 128 gradations).
Response:
Response refers to the type of response. This IC outputs data to SDO terminal at the fall of SCL signal. In SP-D8/SP-D7/I2C, received data are
checked, and a result is returned (ACK or NACK). In CE-D8, a synchronization signal indicating in-communication status is output (SYN).
Received data are not checked.
Chip Enable
This IC has chip enable terminal (CE). If L is input as signal to the chip enable terminal, the chip becomes effective.
Serial Communication with Address (SP-D8, SP-D7), I2C-based Serial Communication
Communication data are received only when the chip is effective. If the chip becomes ineffective during communication, the IC interior passes into the wait condition,
and received communication data are ignored.
Serial Communication with Address (CE-D8)
The change of a chip enabled input signal means the start or termination of communication. If the chip passes from an effective condition (L input) into an ineffective
condition (H input), judgment is made that the communication has terminated, and the IC interior returns to the initial condition.
LED Control IC
W2RG012RN
7
Communication Format
Serial Communication with Address (SP-D8 Mode)
Word length: 0; gradation data: 8-bit designation
bit
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
1
1
1
1
1
1
1
1
1
884 885 886 887 888 889 890 891 892 893 894 895 896
SCL
SDA
Name
START
SDO
Name
0
0
0
1 0
Device
Device
Address
ID
Device selection data
dvc_dat[7:0]
0
R
W
0
S
P
0
0
0
Word
length
Register address
Register selection data
reg_dat[7:0]
0
1
ACK
0
S
P
Gradation data (0)
light_dat0[7:0]
1
0
1
S
P
Gradation data (95)
light_dat95[7:0]
1
0
1
1
1
Byte
STOP Adjustment
1
ACK
ACK
1
0
0
ACK
Word length: 1; gradation data: 4-bit designation
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
1
452 453 454 455 456 457 458 459 460 461 462 463 464
0
Word
length
Register address
0
1
1
1
1
1
Byte
S Gradation data (0) Gradation data (1) S Gradation data (94) Gradation data (95) STOP
light_dat1[3:0] P light_dat94[3:0] light_dat95[3:0]
Adjustment
P light_dat0[3:0]
Register selection data
reg_dat[7:0]
0
0
1
0
1
ACK
1
0
0
ACK
ACK
Byte adjustment: When transmitting data with 8 bits as unit, “1” is designated to remaining bits after STOP.
Serial Communication with Address (SP-D7 Mode)
bit
SCL
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
SDA
1
1
1
1
1
1
1
1
0
Name
START
SDO
Name
0
0
1 0
Device
Device
ID
Address
Device selection data
dvc_dat[6:0]
0
0
Register address
S
P
Register selection data
reg_dat[6:0]
1
0
0
ACK
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
1
0
S
P
Gradation data (0)
light_dat0[6:0]
1
0
S
P
Gradation data (95)
light_dat95[6:0]
1
0
ACK
Serial Communication with Address (CE-D8 Mode)
Word length: 0; gradation data: 8-bit designation
1
bit
CE
SCL
SDA
0
1
Name
START
SDO
Name
0
2
3
4
5
6
7
1 0
Device
Device
ID
Address
Device selection data
dvc_dat[7:0]
8
0
R
W
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 777 778 779 780 781 782 783 784
1
0
Word
length
Register address
Gradation data (0)
light_dat0[7:0]
Register selection data
reg_dat[7:0]
1
0
1
0
SYN
Gradation data (95)
light_dat95[7:0]
1
0
SYN
STOP
1
0
SYN
0
SYN
Word length: 1; gradation data: 4-bit designation
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 393 394 395 396 397 398 399 400
1
1
Word
length
Register address
Gradation data (0) Gradation data (1) Gradation data (94) Gradation data (95)
light_dat0[3:0]
light_dat1[3:0] light_dat94[3:0] light_dat95[3:0]
Register selection data
reg_dat[7:0]
1
0
1
0
SYN
STOP
1
0
SYN
0
SYN
I2C-based Serial Communication (I2C Mode)
Word length: 0; gradation data: 8-bit designation
Name
START
SDO
Name
0
(Open)
4
5
6
7
1 0
Device
Device
ID
Address
Device selection data
dvc_dat[7:0]
0
(Open)
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
0
1
R
W
0
Word
length
1
Register address
Register selection data
reg_dat[7:0]
1
0
(Open)
ACK
1
ACK
874 875 876 877 878 879 880 881 882
1
1
Gradation data (95)
light_dat95[7:0]
(Open)
0
3
(Open)
SDA
2
(Open)
1
(Open)
bit
SCL
1
0
(Open)
ACK
Gradation data (0)
light_dat0[7:0]
0
(Open)
ACK
STOP
1
(Open)
Word length: 1; gradation data: 4-bit designation
Register selection data
reg_dat[7:0]
0
(Open)
8
LED Control IC
W2RG012RN
1
1
Gradation data (0) Gradation data (1)
light_dat0[3:0]
light_dat1[3:0]
(Open)
1
Register address
(Open)
1
Word
length
442 443 444 445 446 447 448 449 450
Gradation data (94) Gradation data (95)
light_dat94[3:0] light_dat95[3:0]
(Open)
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
1
1
1
STOP
1
ACK
ACK
1
1
0
1
0
1
0
ACK
(Open)
ACK
(Open)
ACK
(Open)
0
1
1
1
■ Command System
Device Designation
If the device ID and device address match IC settings, received data are retrieved. Device ID is fixed as “010”. The same command can be transmitted to all devices by designating “1111” as device address. The relationship between device address and device address terminal is shown in
the table below.
Communication mode
7
6
Device ID
5
Standard
SP-D7
0
1
0
7
Word Length
---
6
5
Device selection data dvc_dat (7:0)
4
3
2
Device Address
ADR1(1:0)
1
0
RW
0
---
1
0
ADR0(1:0)
Register Designation
Communication mode
Standard
SP-D7
Register Selection data reg_dat (7:0)
4
3
2
Register Address
Word length designation
0
1
Word length
8bit
4bit
Word Length
The data unit of gradation data is designated.
Register Address (Designation of lighting position)
The address of gradation register is designated. The upper limit of address that can be designated, and the number of gradation that can be transferred continuously, vary according to division mode setting and word length designation.
Register address (Special address)
All gradation registers can be designated collectively by designating 0x7F (127).
The power saving register can be designated by designating 0x78 (120)
Gradation Data
Communication mode
7
Standard (8-bit)
Standard (4-bit)
6
5
Gradation data light_dat(7:0)
4
3
Gradation Data
Gradation Data N
SP-D7
2
1
0
Gradation Data N+1
Gradation Data
---
Gradation Designation
Gradation data are designated using 8 bits (256 gradations), 7 bits (128 gradations), or 4 bits (16 gradations).
Power-saving Mode
When the power-saving data register is designated by register address-bits, the lowest 4 bits are treated as power-saving data.
Communication
mode
Standard
SP-D7
7
0
---
6
0
0
Gradation data light_dat(7:0)
5
4
3
2
1
0
0
0 Power-saving data Power-saving data
(current control) (duty ratio control)
0
0
Power-saving
Data
00
01
10
11
LED Control IC
Output current or
output duty ratio
100%
75%
50%
25%
W2RG012RN
9
■ Gradation Control
Designation of Gradation
Gradation is designated using a data length of 8 bits (256 gradations), 7 bits (128 gradations), or 4 bits (16 gradations). The 8-bit or 4-bit mode can
be selected using a word length bit in a communication command. In case of the 4-bit mode, the overall data length for communication can be
shortened, though only a small number of gradations can be designated. In case of SP-D7 mode in serial communication with address, the word
length is fixed at 7 bits, i.e., it is not designated.
Communication mode
Word length
8-bit mode
4-bit mode
Gradation number
256
16
Serial communication with address
(SP-D7)
---
128
Serial communication with address
(CE-D8)
8-bit mode
4-bit mode
256
16
I2C-based serial communication (I2C)
8-bit mode
4-bit mode
256
16
Serial communication with address
(SP-D8)
The relationship between lighting gradation and output duty ratio is shown below;
Lighting Gradation vs. Output Duty Ratio
(Representative Values Only)
Output duty ratio
Lighting Gradation vs. Output Duty Ratio
100 %
90 %
80 %
70 %
60 %
50 %
40 %
30 %
20 %
10 %
0%
24×1
24×2
24×4
16×8
0
32
64
96 128 160 192 224 255
Lighting gradation
10
LED Control IC
W2RG012RN
Lighting
gradation
(8-bit)
Lighting
gradation
(7-bit)
Lighting
gradation
(4-bit)
24x1
Matrix configuration
24x2
24x4
16x8
0
0
0
(Light-out)
(Light-out)
(Light-out)
(Light-out)
15
7
---
0.37%
0.18%
0.09%
0.05%
31
15
1
0.76%
0.38%
0.19%
0.09%
47
23
2
1.15%
0.57%
0.29%
0.14%
63
31
3
1.54%
0.77%
0.38%
0.19%
79
39
4
2.29%
1.15%
0.57%
0.29%
95
47
5
3.08%
1.54%
0.77%
0.38%
111
55
6
4.59%
2.29%
1.15%
0.57%
127
63
7
6.15%
3.08%
1.54%
0.77&
143
71
8
9.18%
4.59%
2.29%
1.15%
159
79
9
12.30%
6.15%
3.08%
1.54%
175
87
10
18.36%
9.18%
4.59%
2.29%
191
95
11
24.61%
12.30%
6.15%
3.08%
207
103
12
36.72%
18.36%
9.18%
4.59%
223
111
13
49.22%
24.61%
12.30%
6.15%
239
119
14
73.44%
36.72%
18.36%
9.18%
255
127
15
98.44%
49.22%
24.61%
12.30%
Lighting Gradation vs. Output Duty Ratio (All Gradations)
Gradation Gradation Gradation
(8-bit)
(7-bit)
(4-bit)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
0
----1
--2
--3
--4
--5
--6
--7
--8
--9
--10
--11
--12
--13
--14
--15
--16
--17
--18
--19
--20
--21
--22
--23
--24
--25
--26
--27
--28
--29
--30
--31
0
------------------------------------------------------------1
------------------------------2
------------------------------3
Matrix configuration
24x1
24x2
24x4
16x8
(Light-out) (Light-out) (Light-out) (Light-out)
0.02
0.01
0.01
0.00
0.05
0.02
0.01
0.01
0.07
0.04
0.02
0.01
0.10
0.05
0.02
0.01
0.12
0.06
0.03
0.02
0.15
0.07
0.04
0.02
0.17
0.09
0.04
0.02
0.20
0.10
0.05
0.02
0.22
0.11
0.05
0.03
0.24
0.12
0.06
0.03
0.27
0.13
0.07
0.03
0.29
0.15
0.07
0.04
0.32
0.16
0.08
0.04
0.34
0.17
0.09
0.04
0.37
0.18
0.09
0.05
0.39
0.20
0.10
0.05
0.42
0.21
0.10
0.05
0.44
0.22
0.11
0.05
0.46
0.23
0.12
0.06
0.49
0.24
0.12
0.06
0.51
0.26
0.13
0.06
0.54
0.27
0.13
0.07
0.56
0.28
0.14
0.07
0.59
0.29
0.15
0.07
0.61
0.31
0.15
0.08
0.63
0.32
0.16
0.08
0.66
0.33
0.16
0.08
0.68
0.34
0.17
0.09
0.71
0.35
0.18
0.09
0.73
0.37
0.18
0.09
0.76
0.38
0.19
0.09
0.78
0.39
0.20
0.10
0.81
0.40
0.20
0.10
0.83
0.42
0.21
0.10
0.85
0.43
0.21
0.11
0.88
0.44
0.22
0.11
0.90
0.45
0.23
0.11
0.93
0.46
0.23
0.12
0.95
0.48
0.24
0.12
0.98
0.49
0.24
0.12
1.00
0.50
0.25
0.13
1.03
0.51
0.26
0.13
1.05
0.52
0.26
0.13
1.07
0.54
0.27
0.13
1.10
0.55
0.27
0.14
1.12
0.56
0.28
0.14
1.15
0.57
0.29
0.14
1.17
0.59
0.29
0.15
1.20
0.60
0.30
0.15
1.22
0.61
0.31
0.15
1.25
0.62
0.31
0.16
1.27
0.63
0.32
0.16
1.29
0.65
0.32
0.16
1.32
0.66
0.33
0.16
1.34
0.67
0.34
0.17
1.37
0.68
0.34
0.17
1.39
0.70
0.35
0.17
1.42
0.71
0.35
0.18
1.44
0.72
0.36
0.18
1.46
0.73
0.37
0.18
1.49
0.74
0.37
0.19
1.51
0.76
0.38
0.19
1.54
0.77
0.38
0.19
Gradation Gradation Gradation
(8-bit)
(7-bit)
(4-bit)
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
--32
--33
--34
--35
--36
--37
--38
--39
--40
--41
--42
--43
--44
--45
--46
--47
--48
--49
--50
--51
--52
--53
--54
--55
--56
--57
--58
--59
--60
--61
--62
--63
------------------------------4
------------------------------5
------------------------------6
------------------------------7
LED Control IC
24x1
1.56
1.61
1.66
1.71
1.76
1.81
1.86
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.29
2.34
2.39
2.44
2.49
2.54
2.59
2.64
2.69
2.73
2.78
2.83
2.88
2.93
2.98
3.03
3.08
3.13
3.22
3.32
3.42
3.52
3.61
3.71
3.81
3.91
4.00
4.10
4.20
4.30
4.39
4.49
4.59
4.69
4.79
4.88
4.98
5.08
5.18
5.27
5.37
5.47
5.57
5.66
5.76
5.86
5.96
6.05
6.15
Matrix configuration
24x2
24x4
0.78
0.39
0.81
0.40
0.83
0.42
0.85
0.43
0.88
0.44
0.90
0.45
0.93
0.46
0.95
0.48
0.98
0.49
1.00
0.50
1.03
0.51
1.05
0.52
1.07
0.54
1.10
0.55
1.12
0.56
1.15
0.57
1.17
0.59
1.20
0.60
1.22
0.61
1.25
0.62
1.27
0.63
1.29
0.65
1.32
0.66
1.34
0.67
1.37
0.68
1.39
0.70
1.42
0.71
1.44
0.72
1.46
0.73
1.49
0.74
1.51
0.76
1.54
0.77
1.56
0.78
1.61
0.81
1.66
0.83
1.71
0.85
1.76
0.88
1.81
0.90
1.86
0.93
1.90
0.95
1.95
0.98
2.00
1.00
2.05
1.03
2.10
1.05
2.15
1.07
2.20
1.10
2.25
1.12
2.29
1.15
2.34
1.17
2.39
1.20
2.44
1.22
2.49
1.25
2.54
1.27
2.59
1.29
2.64
1.32
2.69
1.34
2.73
1.37
2.78
1.39
2.83
1.42
2.88
1.44
2.93
1.46
2.98
1.49
3.03
1.51
3.08
1.54
W2RG012RN
16x8
0.20
0.20
0.21
0.21
0.22
0.23
0.23
0.24
0.24
0.25
0.26
0.26
0.27
0.27
0.28
0.29
0.29
0.30
0.31
0.31
0.32
0.32
0.33
0.34
0.34
0.35
0.35
0.36
0.37
0.37
0.38
0.38
0.39
0.40
0.42
0.43
0.44
0.45
0.46
0.48
0.49
0.50
0.51
0.52
0.54
0.55
0.56
0.57
0.59
0.60
0.61
0.62
0.63
0.65
0.66
0.67
0.68
0.70
0.71
0.72
0.73
0.74
0.76
0.77
11
Lighting Gradation vs. Output Duty Ratio (All Gradations - continued)
Gradation Gradation Gradation
(8-bit)
(7-bit)
(4-bit)
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
12
--64
--65
--66
--67
--68
--69
--70
--71
--72
--73
--74
--75
--76
--77
--78
--79
--80
--81
--82
--83
--84
--85
--86
--87
--88
--89
--90
--91
--92
--93
--94
--95
------------------------------8
------------------------------9
------------------------------10
------------------------------11
LED Control IC
24x1
6.25
6.45
6.64
6.84
7.03
7.23
7.42
7.62
7.81
8.01
8.20
8.40
8.59
8.79
8.98
9.18
9.38
9.57
9.77
9.96
10.16
10.35
10.55
10.74
10.94
11.13
11.33
11.52
11.72
11.91
12.11
12.30
12.50
12.89
13.28
13.67
14.06
14.45
14.84
15.23
15.63
16.02
16.41
16.80
17.19
17.58
17.97
18.36
18.75
19.14
19.53
19.92
20.31
20.70
21.09
21.48
21.88
22.27
22.66
23.05
23.44
23.83
24.22
24.61
Matrix configuration
24x2
24x4
3.13
1.56
3.22
1.61
3.32
1.66
3.42
1.71
3.52
1.76
3.61
1.81
3.71
1.86
3.81
1.90
3.91
1.95
4.00
2.00
4.10
2.05
4.20
2.10
4.30
2.15
4.39
2.20
4.49
2.25
4.59
2.29
4.69
2.34
4.79
2.39
4.88
2.44
4.98
2.49
5.08
2.54
5.18
2.59
5.27
2.64
5.37
2.69
5.47
2.73
5.57
2.78
5.66
2.83
5.76
2.88
5.86
2.93
5.96
2.98
6.05
3.03
6.15
3.08
6.25
3.13
6.45
3.22
6.64
3.32
6.84
3.42
7.03
3.52
7.23
3.61
7.42
3.71
7.62
3.81
7.81
3.91
8.01
4.00
8.20
4.10
8.40
4.20
8.59
4.30
8.79
4.39
8.98
4.49
9.18
4.59
9.38
4.69
9.57
4.79
9.77
4.88
9.96
4.98
10.16
5.08
10.35
5.18
10.55
5.27
10.74
5.37
10.94
5.47
11.13
5.57
11.33
5.66
11.52
5.76
11.72
5.86
11.91
5.96
12.11
6.05
12.30
6.15
W2RG012RN
16x8
0.78
0.81
0.83
0.85
0.88
0.90
0.93
0.95
0.98
1.00
1.03
1.05
1.07
1.10
1.12
1.15
1.17
1.20
1.22
1.25
1.27
1.29
1.32
1.34
1.37
1.39
1.42
1.44
1.46
1.49
1.51
1.54
1.56
1.61
1.66
1.71
1.76
1.81
1.86
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.29
2.34
2.39
2.44
2.49
2.54
2.59
2.64
2.69
2.73
2.78
2.83
2.88
2.93
2.98
3.03
3.08
Gradation Gradation Gradation
(8-bit)
(7-bit)
(4-bit)
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
--96
--97
--98
--99
--100
--101
--102
--103
--104
--105
--106
--107
--108
--109
--110
--111
--112
--113
--114
--115
--116
--117
--118
--119
--120
--121
--122
--123
--124
--125
--126
--127
------------------------------12
------------------------------13
------------------------------14
------------------------------15
24x1
25.00
25.78
26.56
27.34
28.13
28.91
29.69
30.47
31.25
32.03
32.81
33.59
34.38
35.16
35.94
36.72
37.50
38.28
39.06
39.84
40.63
41.41
42.19
42.97
43.75
44.53
45.31
46.09
46.88
47.66
48.44
49.22
50.00
51.56
53.13
54.69
56.25
57.81
59.38
60.94
62.50
64.06
65.63
67.19
68.75
70.31
71.88
73.44
75.00
76.56
78.13
79.69
81.25
82.81
84.38
85.94
87.50
89.06
90.63
92.19
93.75
95.31
96.88
98.44
Matrix configuration
24x2
24x4
12.50
6.25
12.89
6.45
13.28
6.64
13.67
6.84
14.06
7.03
14.45
7.23
14.84
7.42
15.23
7.62
15.63
7.81
16.02
8.01
16.41
8.20
16.80
8.40
17.19
8.59
17.58
8.79
17.97
8.98
18.36
9.18
18.75
9.38
19.14
9.57
19.53
9.77
19.92
9.96
20.31
10.16
20.70
10.35
21.09
10.55
21.48
10.74
21.88
10.94
22.27
11.13
22.66
11.33
23.05
11.52
23.44
11.72
23.83
11.91
24.22
12.11
24.61
12.30
25.00
12.50
25.78
12.89
26.56
13.28
27.34
13.67
28.13
14.06
28.91
14.45
29.69
14.84
30.47
15.23
31.25
15.63
32.03
16.02
32.81
16.41
33.59
16.80
34.38
17.19
35.16
17.58
35.94
17.97
36.72
18.36
37.50
18.75
38.28
19.14
39.06
19.53
39.84
19.92
40.63
20.31
41.41
20.70
42.19
21.09
42.97
21.48
43.75
21.88
44.53
22.27
45.31
22.66
46.09
23.05
46.88
23.44
47.66
23.83
48.44
24.22
49.22
24.61
16x8
3.13
3.22
3.32
3.42
3.52
3.61
3.71
3.81
3.91
4.00
4.10
4.20
4.30
4.39
4.49
4.59
4.69
4.79
4.88
4.98
5.08
5.18
5.27
5.37
5.47
5.57
5.66
5.76
5.86
5.96
6.05
6.15
6.25
6.45
6.64
6.84
7.03
7.23
7.42
7.62
7.81
8.01
8.20
8.40
8.59
8.79
8.98
9.18
9.38
9.57
9.77
9.96
10.16
10.35
10.55
10.74
10.94
11.13
11.33
11.52
11.72
11.91
12.11
12.30
Designation of Lighting Position
The lighting position is designated with a register address in a communication command. The relationship between register address and lighting
position in each matrix configuration is shown in the table below.
Matrix Configuration
Matrix Configuration
Register
Address
24x1
24x2
24x4
Even-number
row
Odd-number
row
0x00 (0)
0x01 (1)
0x02 (2)
0x03 (3)
0x04 (4)
0x05 (5)
0x06 (6)
0x07 (7)
0x08 (8)
0x09 (9)
0x0A (10)
0x0B (11)
0x0C (12)
0x0D (13)
0x0E (14)
0x0F (15)
0x10 (16)
0x11 (17)
0x12 (18)
0x13 (19)
0x14 (20)
0x15 (21)
0x16 (22)
0x17 (23)
0x18 (24)
0x19 (25)
0x1A (26)
0x1B (27)
0x1C (28)
0x1D (29)
0x1E (30)
0x1F (31)
0x20 (32)
0x21 (33)
0x22 (34)
0x23 (35)
0x24 (36)
0x25 (37)
0x26 (38)
0x27 (39)
0x28 (40)
0x29 (41)
0x2A (42)
0x2B (43)
0x2C (44)
0x2D (45)
0x2E (46)
0x2F (47)
(0, 0)
(1 ,0)
(2, 0)
(3, 0)
(4, 0)
(5, 0)
(6, 0)
(7, 0)
(8, 0)
(9, 0)
(10, 0)
(11, 0)
(12, 0)
(13, 0)
(14, 0)
(15, 0)
(16, 0)
(17, 0)
(18, 0)
(19, 0)
(20, 0)
(21, 0)
(22, 0)
(23, 0)
-------------------------------------------------
(0, 0)
(1, 0)
(2, 0)
(3, 0)
(4, 0)
(5, 0)
(6, 0)
(7, 0)
(8, 0)
(9, 0)
(10, 0)
(11, 0)
(12, 0)
(13, 0)
(14, 0)
(15, 0)
(16, 0)
(17, 0)
(18, 0)
(19, 0)
(20, 0)
(21, 0)
(22, 0)
(23, 0)
(0, 1)
(1, 1)
(2, 1)
(3, 1)
(4, 1)
(5, 1)
(6, 1)
(7, 1)
(8, 1)
(9, 1)
(10, 1)
(11, 1)
(12, 1)
(13, 1)
(14, 1)
(15, 1)
(16, 1)
(17, 1)
(18, 1)
(19, 1)
(20, 1)
(21, 1)
(22, 1)
(23, 1)
(0, 0)
(1, 0)
(2, 0)
(3, 0)
(4, 0)
(5, 0)
(6, 0)
(7, 0)
(8, 0)
(9, 0)
(10, 0)
(11, 0)
(12, 0)
(13, 0)
(14, 0)
(15, 0)
(16, 0)
(17, 0)
(18, 0)
(19, 0)
(20, 0)
(21, 0)
(22, 0)
(23, 0)
(0, 1)
(1, 1)
(2, 1)
(3, 1)
(4, 1)
(5, 1)
(6, 1)
(7, 1)
(8, 1)
(9, 1)
(10, 1)
(11, 1)
(12, 1)
(13, 1)
(14, 1)
(15, 1)
(16, 1)
(17, 1)
(18, 1)
(19, 1)
(20, 1)
(21, 1)
(22, 1)
(23, 1)
(0, 0)
(2, 0)
(4, 0)
(6, 0)
(8, 0)
(10, 0)
(12, 0)
(14, 0)
(0, 1)
(2, 1)
(4, 1)
(6, 1)
(8, 1)
(10, 1)
(12, 1)
(14, 1)
(0, 2)
(2, 2)
(4, 2)
(6, 2)
(8, 2)
(10, 2)
(12, 2)
(14, 2)
(0, 3)
(2, 3)
(4, 3)
(6, 3)
(8, 3)
(10, 3)
(12, 3)
(14, 3)
(0, 4)
(2, 4)
(4, 4)
(6, 4)
(8, 4)
(10, 4)
(12, 4)
(14, 4)
(0, 5)
(2, 5)
(4, 5)
(6, 5)
(8, 5)
(10, 5)
(12, 5)
(14, 5)
(1, 0)
(3, 0)
(5, 0)
(7, 0)
(9, 0)
(11, 0)
(13, 0)
(15, 0)
(1, 1)
(3, 1)
(5, 1)
(7, 1)
(9, 1)
(11, 1)
(13, 1)
(15, 1)
(1, 2)
(3, 2)
(5, 2)
(7, 2)
(9, 2)
(11, 2)
(13, 2)
(15, 2)
(1, 3)
(3, 3)
(5, 3)
(7, 3)
(9, 3)
(11, 3)
(13, 3)
(15, 3)
(1, 4)
(3, 4)
(5, 4)
(7, 4)
(9, 4)
(11, 4)
(13, 4)
(15, 4)
(1, 5)
(3, 5)
(5, 5)
(7, 5)
(9, 5)
(11, 5)
(13, 5)
(15, 5)
16x8
Register
Address
24x1
24x2
24x4
Even-number
row
Odd-number
row
0x30 (48)
0x31 (49)
0x32 (50)
0x33 (51)
0x34 (52)
0x35 (53)
0x36 (54)
0x37 (55)
0x38 (56)
0x39 (57)
0x3A (58)
0x3B (59)
0x3C (60)
0x3D (61)
0x3E (62)
0x3F (63)
0x40 (64)
0x41 (65)
0x42 (66)
0x43 (67)
0x44 (68)
0x45 (69)
0x46 (70)
0x47 (71)
0x48 (72)
0x49 (73)
0x4A (74)
0x4B (75)
0x4C (76)
0x4D (77)
0x4E (78)
0x4F (79)
0x50 (80)
0x51 (81)
0x52 (82)
0x53 (83)
0x54 (84)
0x55 (85)
0x56 (86)
0x57 (87)
0x58 (88)
0x59 (89)
0x5A (90)
0x5B (91)
0x5C (92)
0x5D (93)
0x5E (94)
0x5F (95)
-------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------
(0, 2)
(1, 2)
(2, 2)
(3, 2)
(4, 2)
(5, 2)
(6, 2)
(7, 2)
(8, 2)
(9, 2)
(10, 2)
(11, 2)
(12, 2)
(13, 2)
(14, 2)
(15, 2)
(16, 2)
(17, 2)
(18, 2)
(19, 2)
(20, 2)
(21, 2)
(22, 2)
(23, 2)
(0, 3)
(1, 3)
(2, 3)
(3, 3)
(4, 3)
(5, 3)
(6, 3)
(7, 3)
(8, 3)
(9, 3)
(10, 3)
(11, 3)
(12, 3)
(13, 3)
(14, 3)
(15, 3)
(16, 3)
(17, 3)
(18, 3)
(19, 3)
(20, 3)
(21, 3)
(22, 3)
(23, 3)
(0, 6)
(2, 6)
(4, 6)
(6, 6)
(8, 6)
(10, 6)
(12, 6)
(14, 6)
(0, 7)
(2, 7)
(4, 7)
(6, 7)
(8, 7)
(10, 7)
(12, 7)
(14, 7)
-----------------------------------------------------------------
(1, 6)
(3, 6)
(5, 6)
(7, 6)
(9, 6)
(11, 6)
(13, 6)
(15, 6)
(1, 7)
(3, 7)
(5, 7)
(7, 7)
(9, 7)
(11, 7)
(13, 7)
(15, 7)
-----------------------------------------------------------------
16x8
Gradation data can be transmitted continuously (continuous transfer). In this case, gradation data are stored sequentially, with the register address
designated at first at the top. Gradation data cannot be transmitted to a register address that is not found in matrix configurations (wrong address).
Communication is terminated if a wrong address is designated, or if a wrong address is reached in continuous transfer of gradation data.
Note: When a 16x8-mode matrix configuration is used, an LED shown in an odd-number row in the table above cannot be designated as the first
address. Gradation data can be transmitted only via continuous transfer to a register address in an odd-number row.
LED Control IC
W2RG012RN
13
■ Matrix Configuration
An LED Matrix configuration can be chosen from among 24x1, 24x2, 24x4 and 16x8 configurations, using division mode setting terminal DIV.
Indication of Lighting Position
O
U
T
S
0
0
OUT0R
OUT0G
OUT0B
OUT1R
OUT1G
OUT1B
OUT2R
OUT2G
OUT2B
OUT3R
OUT3G
OUT3B
OUT4R
OUT4G
OUT4B
OUT5R
OUT5G
OUT5B
OUT6R
OUT6G
OUT6B
OUT7R
OUT7G
OUT7B
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
O
U
T
S
0
O
U
T
S
1
0
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24 x 1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
*
24 x 2
O
U
T
S
0
O
U
T
S
1
O
U
T
S
2
O
U
T
S
3
0
1
2
3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
*
O
U
T
S
0
O
U
T
S
1
O
U
T
S
2
O
U
T
S
3
O
U
T
S
4
O
U
T
S
5
O
U
T
S
6
O
U
T
S
7
0
1
2
3
4
5
6
7
*
16 x 8
Note: (3, 1) indicates the position of
the asterisk (*)
24 x 4
Examples of circuits in different matrix configurations are shown in the following:
16 x 8 Configuration
VCC
……
• •
OUTS0
OUTS1
OUTS7
R
R
R
G
G
G
B
B
……
B
OUT0R
OUT0G
OUT0B
R
R
R
G
G
G
B
B
……
B
• •
• •
• •
• •
• •
• •
• •
• •
• •
OUT1R
OUT1G
OUT1B
R
R
R
G
G
G
B
B
R
R
……
B
OUT4R
OUT4G
OUT4B
OUT5R
14
LED Control IC
W2RG012RN
……
R
24 x 4 Configuration
VCC
OUTS0
OUTS1
OUTS2
OUTS3
R
R
R
R
G
G
G
G
B
B
B
B
R
R
R
R
G
G
G
G
B
B
B
B
OUT0R
OUT0G
OUT0B
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
OUT1R
OUT1G
OUT1B
R
R
R
R
G
G
G
G
B
B
B
B
OUT7R
OUT7G
OUT7B
24 x 1 Configuration
VCC
VCC
OUTS0
OUTS1
R
R
G
G
B
B
OUT0R
OUT0G
OUT0B
R
G
G
B
B
OUT0R
R
OUT0G
G
OUT0B
B
OUT1R
R
OUT1G
G
OUT1B
B
• •
R
• •
• •
• •
• •
• •
• •
• •
OUT1R
OUT1G
OUT1B
• •
24 x 2 Configuration
R
R
G
G
B
B
OUT7R
R
OUT7G
G
OUT7B
B
OUT7R
OUT7G
OUT7B
LED Control IC
W2RG012RN
15
■ Control Waveform
The matrix is controlled by switching between ON and OFF of drive output terminals (OUT0R - 7B) and switch output terminals (OUTS0 - 7).
Control Waveform (Overall)
PWM period: 1 ms
128XTI
(=15.625μs)
Open
OUTX-a
(PWM)
GND
Open
OUTX-b
(PWM)
GND
Open
OUTX-c
(PWM)
GND
Open
OUTX-d
(PWM)
GND
Open
OUTS0
GND
Open
OUTS1
GND
Open
OUTS2
...
GND
Open
OUTS7
GND
VDD
OUTDC
GND
Control Waveform (at Switching)
128XTI
(=15.625us)
Open
OUTX-a
(PWM)
OUTX-b
(PWM)
GND
Open
2XTI
GND
Open
OUTX-c
(PWM)
GND
Open
OUTX-d
(PWM)
GND
8XTI
OUTS0
8XTI
Open
GND
Open
OUTS1
...
GND
40XTI 32XTI
40XTI
OUTDC
VDD
GND
Note: XTI = 8.192 MHz = 122.07 ns. The indication of duration in these figures is for 16x8 configuration. The duration is twice the indicated value
for 24x4 configuration; 4 times for 24x2 configuration; and 8 times for 24x1 configuration.
16
LED Control IC
W2RG012RN
Drive Output Group
Adjoining drive output terminals (OUT0R - 7B) have different change timings. This difference is designed to reduce noise caused by the simultaneous change of drive output. There are 4 change timings, by which drive outputs are grouped as follows:
Drive output
terminal
OUT0R
OUT0G
OUT0B
OUT1R
OUT1G
OUT1B
OUT2R
OUT2G
OUT2B
OUT3R
OUT3G
OUT3B
OUT4R
OUT4G
OUT4B
OUT5R
OUT5G
OUT5B
OUT6R
OUT6G
OUT6B
OUT7R
OUT7G
OUT7B
OUTX-a
{
Drive output group
OUTX-b
OUTX-c
OUTX-d
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{(*)
{(*)
{(*)
{(*)
{(*)
{(*)
{(*)
{(*)
Note: *This does not apply when the division mode is set as 16x8 configuration, in which case the following operations are executed:
OUT5G - 6G: Not used.
OUT6B - OUT7B: Functions as OUTS4 - 7
Synchronous Control Output
Synchronous control output terminal (OUTDC) outputs control signals synchronized with lighting switch. These signals are used to drive external
circuits at lighting switch.
■ Power-saving Control
Power saving data is set, via communications as 100%, 75%, 50% or 25%. Current or duty ratio control is used as control method. Power saving
data can be set separately via either of these methods.
Current Control
Output currents are changed collectively according to a designated ratio to a current set with current setting terminal REXTR/REXTG/REXTB.
Note: The hue of a full-color LED in normal operation may be different from that in power-saving operation, due to differences in current characteristics among R/G/B.
Duty Ratio Control
Output duty ratios are changed collectively according to a designated ratio to a duty ratio designated to a particular gradation.
LED Control IC
W2RG012RN
17
■ Application Example
5V
2
1
3
SCL
SDA
CE
47
SDO
Transmission
circuit
Reception
circuit
OUTS0
OUTS1
OUTS2
OUTS3
42
43
44
45
OUT0R
OUT0G
OUT0B
OUT1R
OUT1G
OUT1B
OUT2R
OUT2G
OUT2B
OUT3R
OUT3G
OUT3B
OUT4R
OUT4G
OUT4B
OUT5R
OUT5G
OUT5B
OUT6R
OUT6G
OUT6B
OUT7R
OUT7G
OUT7B
14
15
16
18
19
20
21
22
24
25
26
27
28
29
30
32
33
34
35
36
38
39
40
41
OUTDC
46
...
x4
5V
VDD
9
DIV
10
COM
7
ADR1
8
ADR0
3.3k
3.3k
3.3k
W2RG012RN
C1
0.1 μF
43k
33k
62k
11
REXTR
12
REXTG
13
REXTB
5
CAP
C2
0.1 μF
C3
0.1 μF
48
RST
6
17
23
31
37
GND
GND
GND
GND
GND
Matrix circuit
Matrix
connection
...
x4
...
4
Matrix
connection
x24
NC
Setting Example
DIV: 24x4 configuration
COM: I2C communication
device address
ADR:
“1101”
R: 59.5 mA (14.9 mA)
Constant current setting G: 77.6 mA (19.4 mA)
B: 41.3 mA (10.3 mA)
Note: Effective values are shown in parentheses.
Dimensions
Recommended
PCB Layout
S
1(max.)
(0.22)
4.7 ± 0.1
25
0.27
Ø
0.3
6
5
4.7 ± 0.1
37
13
48
1
C0.2
0.75 ± 0.2
0.5 ± 0.1
0.25
+0.05
-0.04
5
0.8(min.)
6
0.8(min.)
12
1 Pin Mark
1.2
36
24
0.4 ± 0.1
7 ± 0.1
0.08 S
0.5
1.2
7 ± 0.1
[Unit : mm]
18
LED Control IC
W2RG012RN
Tape Packaging
Packaging style: Embossed taping
Packaging quantity: 1,500 pcs/reel
Reel Dimensions
2±
0.5
80±1
13±0.2
Ø21±0.8
17.5±1
21.5±1
330±2
Direction of Insertion
1234
1234
1234
1234
1234
1234
Pin No.1
Reel
Drawing direction
±0.1
0
4±0.1
2±0.1
0.3±0.05
Ø1.5±1
12±0.1
7.5±0.05
16±0.3
7.2±0.05
Ø1.5
1.75±0.1
Embossed Tape Dimensions
(1.15)
(0.65)
1.8±0.1
7.2±0.05
LED Control IC
W2RG012RN
19
Precautions for Use
• The absolute maximum rating is the limit value which should not be
exceeded even momentarily. Exceeding this value can cause deterioration of the characteristics or complete failure of the IC.
• Check the operation at the communication frequency to be used
before using the device.
• Sufficiently take into consideration the static electricity, chattering
and voltage of the input to be connected when determining each
input circuit.
• Although the device contains an ESD protection circuit, static electricity that exceeds the function may damage the device. When
handling the device, exercise due caution by, for example, grounding the body of the handler.
• Execute thermal design providing for a sufficient margin, by considering allowable dissipation in the actual operating condition. If a
high voltage is applied to IC (e.g. due to a small number of driven
series LEDs), heating of the IC can be controlled by inserting a
resistance to disperse power dissipation.
• A thermal shutdown circuit is built in this IC. If chip temperature has
risen abnormally, this circuit works to open output terminals. The
original condition is restored when chip temperature has decreased
to a normal level. As this circuit is provided as protection in the
event of emergency, do not use it on a regular basis.
• Due to potential damage, do not use product that has been
dropped or that has come into contact with water.
■ Cautions on Mounting
Mounting on a Flexible Substrate
When mounting the product on a flexible substrate, a reed may be
detached after mounting due to stress transmitted through the substrate. Therefore, it is recommended to use, for mounting, a reinforced substrate or an underfill, etc.
Flexible substrate
Underfill
■ Recommended Reflow
Conditions
Allowable Temperature Profile Conditions
Product mounting method should be by Reflow and we recommend
the following temperature profile. Reflow no more than twice.
260°C (max)
Package surface temperature
■ Correct Use
250°C
10s (max)
220°C
200°C
140°C
60~120s
60s (max)
Time
Storage Conditions before Mounting
Moisture absorption by the plastic package will increase the possibility of faults, such as cracks; therefore, take enough care for storage.
Before moisture-proof
package is opened
After moisture-proof
package is opened
Storage Conditions
Period
5 to 30°C, 40 to 70%RH
1 Year
5 to 30°C, 40 to 70%RH
168 hours
Recommended Drying Conditions
If the allowable storage period after opening a moisture-proof package
has been exceeded, dry the products under the following conditions
before mounting them:
Temperature
60°C
Time
72 hours
Frequency
Once or twice
Reinforcing plate
■ RoHS Directive Compliance
Reworking with a Soldering Iron
The user is strictly admonished against the use of soldering iron for
rework. Such a use may cause mold cracking or open terminals.
Models that are indicated as being RoHS compliant do not exceed
the threshold value for the following six substances.
Lead:
Mercury:
Cadmium:
Hexavalent chromium:
PBB:
PBDE:
1,000 ppm max.
1,000 ppm max.
100 ppm max.
1,000 ppm max.
1,000 ppm max.
1,000 ppm max.
■ Lot Code Indication
Control Code: Three
alphanumeric characters
Production week: Serial numbers
(01~) from the week including
January1
Production year: The last
digit of the calendar year
20
LED Control IC
W2RG012RN
MEMO
LED Control IC
W2RG012RN
21
