6

LED Control IC

W2RG012RN

Selection of Division Mode (continued)

The function of output terminal varies according to matrix configura-

tion. The relationship between matrix configuration and terminal

function is shown in the table below.

Selection of Communication mode

The communication mode is set by inputting resistance partial pres-

sure to communication mode setting terminal (COM). The relation-

ship between communication mode and COM terminal voltage is

shown in the table below.

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.

Formula for Current Setting

I

Recommended Operating Conditions

I

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: I

Output

terminal

Matrix Configuration

24x1

24x2

24x4

16x8

OUT0R

OUT0R

OUT0G

OUT0G

OUT0B

OUT0B

OUT1R

OUT1R

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

OUTS7

OUTS0

OUTS0

OUTS1

(Not used)

OUTS1

OUTS2

(Not used)

(Not used)

OUTS2

OUTS3

(Not used)

(Not used)

OUTS3

Communication mode

COM

Serial communication with address (SP-D8)

GND

Serial communication with address (SP-D7)

V

V

DD

Serial communication with address (CE-D8)

V

0

50

100

150

200

250

300

REXT resistance (k

Ω)

Current vs. REXT resistance

0

10

20

30

40

50

60

70

80

Current

(mA)

REXT

resistance

(k

Ω)

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