W742C813 Datasheet, PDF (6/56 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C813
4. PIN DESCRIPTION
SYMBOL
I/O
XIN2
I
XOUT2
O
XIN1
I
XOUT1
O
RA0−RA3
I/O
Data_IO
RB0−RB3
I/O
RC0−RC3
I
RD0−RD3
I
RE0−RE3
O
RF0−RF3
P00−P03
I/O
P10−P13
I
Mode
MFP
O
DTMF
O
FUNCTION
Input pin for sub-oscillator.
Connected to 32.768 KHz crystal only.
Output pin for sub-oscillator with internal oscillation capacitor.
Connected to 32.768 KHz crystal only.
Input pin for main-oscillator.
Connected to 3.58 MHz crystal or resistor to generate system clock.
Output pin for main-oscillator.
Connected to 3.58 MHz crystal or resistor to generate system clock.
Input/Output port.
Input/output mode specified by port mode 1 register (PM1).
RA.3: serial data Input/Output for electrical erasable EPROM type
Input/Output port.
Input/output mode specified by port mode 2 register (PM2).
Input port only.
Each pin has an independent interrupt capability.
Input port only.
This port can release hold mode but can not occur interrupt service
routine.
Output port only. CMOS type with high sink current capacity for the
LED application.
Input/Output port.
Input/output mode specified by port mode 6 register (PM6).
P0.0 and P0.1 can be a serial I/O interface selected by SIR register.
P0.0 indicates serial clock, P0.1indicates serial data.
Input port only.
P1.2 & P1.3 indicates hardware interrupt ( INT0 & INT1 )
P1.3: Mode select for electrical erasable EPROM type
Output pin only,default in low state.
This pin can output modulating or nonmodulating frequency, or Timer
1 clock output specified by mode register 1 (MR1).
This pin can output dual-tone multifrequency signal for dialling.
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