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PT6955 V1.5

- 7 -

June, 2005

LED Driver IC

PT6955

COMMAND 3: ADDRESS SETTING COMMANDS

Address Setting Commands are used to set the address of the display memory. The address is

considered valid if it has a value of “00H” to 0DH”. If the address is set to 0EH or higher, the data is

ignored until a valid address is set. When power is turned ON, the address is set at “00H”.

Please refer to the diagram below.

MSB

LSB

1

1

-

-

b3 b2 b1 b0

Not Relevant

Address: 00H to 0DH

Display Mode and RAM Address

Data transmitted from an external device to PT6955 via the serial interface are stored in the Display

RAM and are assigned addresses. The RAM Addresses of PT6955 are given below in 8 bits unit.

SG1

SG4

SG5

SG8

SG9

SG12

00HL

00HU

01HL

DIG1

02HL

02HU

03HL

DIG2

04HL

04HU

05HL

DIG3

06HL

06HU

07HL

DIG4

08HL

08HU

09HL

DIG5

0AHL

0AHU

0BHL

DIG6

0CHL

0CHU

0DHL

DIG7

b0

b3

b4

b7

xxHL

xxHU

Lower 4 bits

Higher 4 bits