STFPC320 datasheet(40/78 Pages) STMICROELECTRONICS

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Commands

STFPC320

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b4: KS3 KEY1

b5: KS3 KEY2

b6: KS4 KEY1

b7: KS4 KEY2

Byte2 and Byte3 follow the same pattern as above for the hotkey configuration. To

select any one of the key as hotkey, the bit value is set to ‘1’.

Description:

To configure an RC hotkey two bytes are required. The first byte is used to specify the

RC address and the second byte is used to specify the hotkey command. Hence

there is the option of having 8 hotkeys from the same RC address or one hotkey each

for 8 different RC address.

byte1, byte2: RC hotkey1

byte3, byte4: RC hotkey2

byte5, byte6: RC hotkey3

byte7, byte8: RC hotkey4

byte9, byte 10: RC hotkey5

byte11, byte12: RC hotkey6

byte13, byte14: RC hotkey7

byte15, byte16: RC hotkey8

If less than 8 RC hotkeys are required, there is no need to fill all the 16 bytes. The number of

configuration bytes sent will depends on how many hotkeys.

For example, to configure 2 hotkeys from 2 different RC addresses for Philips RC-5 protocol:

Philips RC-5 Device Address: XXX00001, Hot Key 1: XX000001

Philips RC-5 Device Address: XXX01100, Hot Key 2: XX000010

Note:

For RC protocols, where the MSB does not end on the 8-bit, the data is configured starting

from b0 (LSB) to the MSB.

Figure 17.

Front panel hotkeys configuration

MSB

LSB

BYTE1

RC address 1

MSB

LSB

BYTE2

b6b5

b4b3b2b1b0

RC hotkey 1

KEY

BYTE1

BYTE2

BYTE3

KEY

BYTE1

BYTE2

BYTE3

STFPC320 Datasheet(PDF) 40 Page - STMicroelectronics

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