STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 16

• Manufacturer Part Number: STFPC320
• Description: Front Panel Controller/driver With Standby Power Management And Real-time Clock
• Manufacturer: STMicroelectronics

Functional description
4.11
4.12
4.13
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Remote control decoder
Remote control (RC) decoder module decodes the signal coming from IR_DATA_IN. The list
of IR remote control protocols recognized by STFPC320 is Philips RC-5, SONY, NEC,
Thomson-RCA, Thomson-R2000 and Matsushita. The selection of remote control protocol
to use is done by setting the RC Protocols register. The commands from RC is used to
wake-up from standby and resume normal operation. All RC keys can be programmed to act
like RC hotkeys. Upon receiving any one of the designated hotkeys, wake-up operation will
begin.
PIN_AV8
External device (e.g. Set Top Box) could pull this pin high to wake-up the system. A low-to-
high transition on this pin will signal the STPFC320 to wake-up and provide power to the
system. This signal is considered high when it is in the range of 2.5-3.6V (proper voltage
division must be done externally so that the STFPC320 PIN_AV8 sees no more than 3.6V).
No action is taken on the high-to-low transition on PIN_AV8. Also when the pin is already a
high, the current state of the system is maintained and it does not trigger anything.
Default state upon power-up
Table below shows the default state of the STFPC320 upon power-up.
Table 2.
S.No.
10
1
2
3
4
5
6
7
8
9
Display
Key-scan
IR (Remote Control)
Display mode
Display address
RC protocol
LED
Dimming
Hot Keys (IR and FP)
Guard timer
Default state
Functions
OFF
ON
ON
12 segment/16 digit
10H with Address increment mode
RC-5 (Raw format)
OFF
1/16 duty factor
Disabled
10s
Default state
STFPC320