C161 Datasheet, PDF (146/400 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

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3DUDOOHO 3RUWV
Note: Due to pin limitations register bit P3.14 is not connected to an IO pin.
Pins P3.15 and P3.12 do not support open drain mode.
Pins P3.1 and P3.0 provide open-drain-only drivers.
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/FOUT.
The table below summarizes the alternate functions of Port 3.
Table 7-3 Alternate Functions of Port 3
Port 3 Pin Alternate Function
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
SCL0
I2C Bus Clock Line 0
(open drain only)
SDA0
I2C Bus Data Line 0
(open drain only)
CAPIN
GPT2 Capture Input
T3OUT
Timer 3 Toggle Latch Output
T3EUD
Timer 3 External Up/Down Input
T4IN
Timer 4 Count Input
T3IN
Timer 3 Count Input
T2IN
Timer 2 Count Input
MRST
SSC Master Receive / Slave Transmit
MTSR
SSC Master Transmit / Slave Receive
TxD0
ASC0 Transmit Data Output
RxD0
ASC0 Receive Data Input
BHE/WRH Byte High Enable / Write High Output
SCLK
SSC Shift Clock Input/Output
-
CLKOUT/FOUT System Clock Output / Programmable Frequency Output
User’s Manual
7-20
1999-08