SC16458

FUNCTION DESCRIPTIONS

COMMANDS

After the STB pin changes from “HIGH” to “LOW”, SC16458G will obtain a command via the DIN pin.

Otherwise, the STB pin is set to “HIGH”, the data/commands being transmitted are considered invalid and the

communication is initialized.

Command 1: data setting commands

The data setting commands executes the data write or data read modes for SC16458G. The data setting

command, the bit 5 and bit 6 (b4, b5) are ignored, bit 7 (b6) is given the value of “1” while bit 8(b7) is set the

value “0”. Please refer to the diagram below.

When power is ON, bit 4 to bit 1 (b3 to b0) are set the value of “0”.

0

-

- b3b2 b1b0

1

Data write & read mode settings:

00: write data to display mode

Not

Relevant

MSB

LSB

Address increment mode settings (display mode):

0: increment address after data has been written (see note 1)

1: fixes address

Mode settings:

0: normal operation mode

1: test mode

Note: 1. If you want to set bit 3 (b2) to “0”, please remember that DIG5 address cannot be ignored since G5

exists, however, it is not externally bonded. Please refer to command 2, display mode and RAM address

section.

Command 2: address setting commands

The address of the display memory is set by address setting commands. If the address has a value of “00H” to

“09H”, it is considered valid. If the address is set to 0AH 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.

1

-

- b3b2 b1b0

1

Address: 00H to 09H

Not

Relevant

MSB

LSB

Display mode and RAM address

When an external device transmits the serial data into SC16458G, this data is stored in the display RAM and

is assigned addresses. The RAM addresses of SC16458G are given below in 8-bit unit.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.2

2004.8.31

Http: www.silan.com.cn

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