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STFPC320 Datasheet(PDF) 12 Page - STMicroelectronics

Part # STFPC320
Description  Front panel controller/driver with standby power management and real-time clock
PDF  78 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STFPC320 Datasheet(HTML) 12 Page - STMicroelectronics

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Pin settings
STFPC320
12/78
3.2
Pin description
Table 2.
Pin description
Pin N°
Name
Type
Description
1
OSC
IN
Connect to an external resistor of value 33 k
Ω ± 1%
2
SW1
IN
General purpose switch input port.
3
SW2
IN
General purpose switch input port.
4
MUTE
OUT
High level means mute status for audio.
Low level stands for normal working.
5STBY
OUT
Pin to control power to the main board. High level means standby status.
Low level stands for normal working. Active high.
6, 38
VDD
SUPPLY 3.3 V ± 10%. Core main supply voltage.
7
XIN
IN
Oscillator input pin. 32.768 KHz crystal.
8
XOUT
OUT
Oscillator output pin. 32.768 KHz crystal.
9
GND
SUPPLY Connect this pin to system GND.
10,11
KEY1, KEY2
IN
Input data to these pins from external keyboard are latched at end of the
display cycle (maximum keyboard size is 12 x 2).
12
READY
IN
High level on this pin means that main board chip has been working
normally. Connect an external pull down resistor of 10k
Ω on this pin.
13
IR_DATA_IN
IN
Remote control input. Connect to IR photodiode.
14 to 25
SEG1/KS1 to
SEG12/KS12
OUT
Segment output pins (dual function as key source).
26
VSS
SUPPLY VFD outputs high voltage pull-down level. VDD- 33.3 V max.
27 to 34
SEG13/GRID16
to SEG20/GRID9
OUT
These pins are selectable for segment or grid driving.
35-37
GRID8 to GRID6
OUT
Grid output pins.
39
RESET_N
IN
Active low reset input.
40-44
GRID5 to GRID1
OUT
Grid output pins.
45
SDA
IN/OUT Serial data in/out. Connect to 3.3 V through an external pull-up resistor.
46
SCL
IN
Serial clock input. Connect to 3.3 V through an external pull-up resistor.
47
PIN_AV8
IN
A rising edge transition on this input will signal wake-up operation. This
signal comes from the SCART interface. The micro processor can use this
signal to start the recording or take other actions.
48
IRQ_N/SQW
OUT
Interrupt/square wave output (open drain). A pull up resistor of 10 k
Ω must
be connected on this pin.
49, 50,
51, 52
LED4, LED3,
LED2, LED1
OUT
CMOS sink outputs (20 mA max).



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