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參數資料
| 型號： | W742S819 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT TELEPHONE CONTROLLER |
| 中文描述： | 4-BIT, OTPROM, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數： | 4/11頁 |
| 文件大小： | 134K |
| 代理商： | W742S819 |
W742S819
- 4 -
4. PIN DESCRIPTION
SYMBOL
I/O
FUNCTION
XIN
I
Input pin for 32.768 Hz oscillator. Connected to 32.768 KHz crystal only.
XOUT
O
Output pin for 32.768 Hz oscillator. Connected to 32.768 KHz crystal
only.
VXXF
I
Regulator for PLL circuit. Connected capacitor (10 uF) to VSS.
VF
I
Low pass filter for PLL circuit. Connected capacitor 0.022uF to VSS.
RA0-RA3
I/O
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
Internal pull-up resistors specified by RAM 7FEH(Refer to chapter 6.16.5)
RB0-RB3
I/O
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
Internal pull-up resistors specified by RAM 7FFH (Refer chapter 6.16.5)
RC0-RC3
I
4-bit port for input only.
Each pin has an independent interrupt capability.
RD0-RD3
I/O
Input/Output port.
Input/output mode specified by port mode 5 register (PM5).
RE0-RE3
O Output port only. With high sink current capacity for the LED application.
RF0-RF3
O
Output port only.
MFP
O
Output pin only.
This pin can output modulating or nonmodulating frequency, or Timer 1
specified frequency. It can be selected by bit 0 of BUZCR (BUZCR.0).
DTMF
O
This pin can output dual-tone multi frequency signal for dialing.
RES
I
System reset pin with low active.
SEG0-SEG23
O
LCD segment output pins.
COM0-
COM7
O
LCD common signal output pins.
The LCD alternating frequency can be selected by code option.
OPP1~3
I
OpAmp1~3 positive input pins
OPN1~3
I
OpAmp1~3 negative input pins
OPO1~3
O
OpAmp1~3 output pins
TEST
I
For IC testing. Connected to Vss in normal usage.
V
DD
V
SS
I
Positive power supply (+).
I
Negative power supply (-).
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