C161RI_1 Datasheet, PDF (118/317 Pages) Siemens Semiconductor Group – 16-Bit CMOS Single-Chip Microcontroller

Parallel Ports
C161RI
Alternate Functions of Port 3
The pins of Port 3 serve for various functions which include external timer control lines, the two
serial interfaces, one I²C Bus interface and the control lines BHE/WRH and CLKOUT.
The table below summarizes the alternate functions of Port 3.
Port 3 Pin
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
P3.8
P3.9
P3.10
P3.11
P3.12
P3.13
-
P3.15
Alternate Function
SCL0
SDA0
CAPIN
T3OUT
T3EUD
T4IN
T3IN
T2IN
MRST
MTSR
TxD0
RxD0
BHE/WRH
SCLK
-
CLKOUT
I²C Bus Clock Line 0 (open drain only)
I²C Bus Data Line 0 (open drain only)
GPT2 Capture Input
Timer 3 Toggle Latch Output
Timer 3 External Up/Down Input
Timer 4 Count Input
Timer 3 Count Input
Timer 2 Count Input
SSC Master Receive / Slave Transmit
SSC Master Transmit / Slave Receive
ASC0 Transmit Data Output
ASC0 Receive Data Input
Byte High Enable / Write High Output
SSC Shift Clock Input/Output
System Clock Output
Alternate Function
No Pin
Port 3
P3.15
P3.13
P3.12
P3.11
P3.10
P3.9
P3.8
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
General Purpose
Input/Output
Figure 7-10
Port 3 IO and Alternate Functions
a)
CLKOUT
SCLK
BHE
RxD0
TxD0
MTSR
MRST
T2IN
T3IN
T4IN
T3EUD
T3OUT
CAPIN
SDA0
SCL0
b)
WRH
Semiconductor Group
7-16
1998-05-01