W78C354 Datasheet, PDF (17/44 Pages) Winbond – MONITOR MICROCONTROLLER

W78C354
P2nSF
Read
Latch
Int.Bus
Write to
Latch
Read
Pin
SDACn+6
D
Q
0
CL
Q
1
Vcc
Internal
Pullup
P2.n/SDACn+6
Figure 3-2. P2.4 to P2.7 architecture (where n = 4−7)
E-3 Port 3
The architecture of Port 3 is similar to that of P2.0. There are no special function control bits for these
bits; the output latch of the bits must be set to high to enable the special functions.
PINS
SPECIAL
FUNCTION
DESCRIPTION
P3.0
SPID/RXD
If serial port is in mode 0, the pin works as the data line of the SPI
port.
If serial port is in mode 1, 2, or 3, the pin works as the RXD of the
80C32 standard.
P3.1
SPIC/TXD
If serial port is in mode 0, the pin works as the clock line of the SPI
port.
If serial port is in mode 1, 2, or 3, the pin works as the TXD of the
80C32 standard.
P3.2
INT0
External Interrupt input
P3.3
-
P3.4
T0
Counter/Timer 0 input
P3.5
T1
Counter/Timer 1 input
P3.6
-
P3.7
-
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Publication Release Date: October 1996
Revision A1