STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 9

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

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