W79E217A Datasheet, PDF (9/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
PIN DESCRIPTION, continued
SYMBOL
TYPE
INITIAL
STATE
DESCRIPTIONS
P1.0−P1.7 I/O S H High
PORT 1: 8-bit, bi-directional I/O port with internal pull-ups. The
ports have alternate functions which are described below:
P1.0, ADC0, T2
P1.1, ADC1, BRAKE
P1.2, ADC2, RXD1
P1.3, ADC3, TXD1
P1.4, ADC4
P1.5, ADC5
P1.6, ADC6
P1.7, ADC7
P2.0-P2.5 I/O S
P2.6-P2.7 I/O D
Tri-state PORT 2: 8-bit, bi-directional I/O port. This port also provides the
upper address bits for accesses to external memory. P2.6 to P2.7
can be software configured as I2C serial ports. P2.0 to P2.5 also
provides PWM0 to PWM5 outputs.
P2.0, A8, PWM0
P2.1, A9, PWM1
P2.2, A10, PWM2
P2.3, A11, PWM3
P2.4, A12, PWM4
P2.5, A13, PWM5
High-Z _{P2.6, A14, SCL}
P2.7, A15, SDA
Note:
a. P2.6 and P2.7 are permanent open drain pins. When
access to external memory beyond 16K region, user
requires to add external pull-up registers (up to 2Kohm) on
these pins. This will result in slight increase in current
consumption.
b. Port 2 power source is from VDDPWM.
P3.0-P3.7 I/O S H High
PORT 3: 8-bit, bi-directional I/O port with internal pull-ups. The
ports have alternate functions which are described below:
P3.0, RXD
P3.1, TXD
P3.2, /INT0
P3.3, /INT1
P3.4, T0, IC0, QEA
P3.5, T1, IC1, QEB
P3.6, /WR
P3.7, /RD
Publication Release Date: December 14, 2007
-9-
Revision A3.0