C167CR
C167SR
Table 2
Pin Definitions and Functions (cont’d)
Symbol Pin
Input Function
Num. Outp.
P3
IO
Port 3 is a 15-bit bidirectional I/O port. It is bit-wise
programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into high-
impedance state. Port 3 outputs can be configured as push/
pull or open drain drivers. The input threshold of Port 3 is
selectable (TTL or special).
The following Port 3 pins also serve for alternate functions:
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
65
66
67
68
69
70
73
74
75
76
77
78
79
I
O
I
O
I
I
T0IN
CAPCOM1 Timer T0 Count Input
GPT2 Timer T6 Toggle Latch Output
T6OUT
CAPIN
T3OUT
T3EUD
T4IN
GPT2 Register CAPREL Capture Input
GPT1 Timer T3 Toggle Latch Output
GPT1 Timer T3 External Up/Down Control Input
GPT1 Timer T4 Count/Gate/Reload/Capture Inp
GPT1 Timer T3 Count/Gate Input
GPT1 Timer T2 Count/Gate/Reload/Capture Inp
SSC Master-Receive/Slave-Transmit Inp./Outp.
SSC Master-Transmit/Slave-Receive Outp./Inp.
ASC0 Clock/Data Output (Async./Sync.)
ASC0 Data Input (Async.) or Inp./Outp. (Sync.)
External Memory High Byte Enable Signal,
External Memory High Byte Write Strobe
SSC Master Clock Output / Slave Clock Input.
I
I
T3IN
T2IN
I/O
I/O
O
I/O
O
O
I/O
O
MRST
MTSR
T×D0
R×D0
BHE
WRH
SCLK
P3.13
P3.15
80
81
CLKOUT System Clock Output (= CPU Clock)
OWE
(VPP)
84
I
Oscillator Watchdog Enable. This input enables the oscillator
watchdog when high or disables it when low e.g. for testing
purposes. An internal pullup device holds this input high if
nothing is driving it.
For normal operation pin OWE should be high or not
connected.
In order to drive pin OWE low draw a current of at least
200 µA.
Data Sheet
8
V3.2, 2001-07
INFINEON [ Infineon ]
