STFPC320 查看數據表（PDF） - STMicroelectronics
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STFPC320
STMicroelectronics
STFPC320 Datasheet PDF : 78 Pages
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Pin settings
STFPC320
3.2
Pin description
Table 2. Pin description
Pin N°
Name
Type
Description
1
OSC
IN Connect to an external resistor of value 33 kΩ ± 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.
5
STBY
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 10kΩ 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.
A rising edge transition on this input will signal wake-up operation. This
47
PIN_AV8
IN 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 kΩ must
be connected on this pin.
49, 50,
51, 52
LED4, LED3,
LED2, LED1
OUT CMOS sink outputs (20 mA max).
12/78
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