STFPC320 datasheet(38/78 Pages) STMICROELECTRONICS

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Commands

STFPC320

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7.3

Display control and hotkey setting command

Description:

Bits b7-b6 = 10 is decoded as a display control and hotkey setting command. The

subsequent bits are decoded as follows:

b5 = 0: sets display control for dimming setting as shown in the table on the next

page.

When b5 = 1, the decoding is based on bits b2-b0 as illustrated below:

b2 b1 b0 = XX1: RC hotkeys and address configuration.

b2 b1 b0 = X1X: front panel hotkeys configuration.

b2 b1 b0 = 1XX: sets the RTC segments location. Refer to the table below for the

configuration.

b4, b3: reserved (the bits can be set to ‘0’)

Note:

XXX on the bit values means don’t care. The bits can be set to ‘0’.

MSB

LSB

When b5 = 0

b2.b0: Sets dimming quantity.

000: Sets pulse width to 1/16.

001: Sets pulse width to 2/16.

010: Sets pulse width to 4/16.

011: Sets pulse width to 10/16.

100: Sets pulse width to 11/16.

101: Sets pulse width to 12/16.

110: Sets pulse width to 13/16.

111: Sets pulse width to 14/16.

b3: Turns on/off display

0: Display off (key scan

continues)

1: Display on

RTC segments configuration

When b5 = 1

b2 b1 b0: 1XX

This command is followed by

sending 7 bytes of configuration

data for RTC segments (byte1-

6) and format configuration

(byte7).

Read 12.3.1 for details.

Remote control hotkeys

When b5 = 1

b2 b1 b0: XX1

Following this command is

16bytes configuration data for 8

RC hotkeys configuration.

Read 12.3.3 for details.

Front panel hotkeys

When b5 = 1

b2 b1 b0: X1X

This command is followed by

sending 3 bytes (24 keys) of

configuration data to set any key

as hotkey.

Read

Section : Thus, if the a

segment is located on

segment 1, the bits b3-b0 are

“0000”. If b segment is

located on segment 2, the

bits b3-b0 are “0001” and so

on. on page 39 for details.

MSB

Segment b

Segment a

LSB

BYTE1

b6b5b4b3b2b1b0

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