STLED316SMTR datasheet(20/33 Pages) STMICROELECTRONICS

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Commands

STLED316S

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8.2

Read command

Description:

LSB 3 -1

→address of the memory

MSB5 and LSB4

→address of the memory bank (page)

MSB 6

→‘0’ auto increment address

‘1’ fixed address

MSB 7

→‘0’ Write command

‘1’ Read command

MSB 8

→‘X’ Unused

Use the page 0x01 to read the LED data and key data.

Set flag for key1 and key2 to ensure that the user reads from the particular key. When

reading the key data from the memory, the IRQ_N will be automatically cleared signifying

that the end of the 8th bit was transmitted correctly.

If the IRQ_N is asserted by the last eight keys, then the user reads the key data (one byte

only by reading the first byte). In this case, the IRQ_N will remain active until the second

byte is read. When the user uses the read key to read the LED and key data, first the user

must choose the address (default address location is 0x00) after which the address will

increment only by 3 addresses (maximum).

8.3

Device configuration

This section describes how to program and read the configuration of the device.

Configuration data comprises of the display setting, dimming setting, display on/off and fixed

MSB 8

MSB 7

MSB6

MSB5

LSB4

LSB3

LSB2

LSB1

Table 12.

Read command

Address

Function

LED data (optional)

Key data byte1

Key data byte2

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