C167CR Datasheet, PDF (16/89 Pages) Siemens Semiconductor Group – 16-Bit CMOS Single-Chip Microcontroller

C167CR
C167SR
General Device Information
Table 2
Pin Definitions and Functions P-MQFP-144-8 (cont’d)
Symbol Pin
No.
Input Function
Outp.
PORT0
IO
P0L.0-7 100-
107
P0H.0-7 108,
111-
117
PORT0 consists of the two 8-bit bidirectional I/O ports P0L
and P0H. 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.
In case of an external bus configuration, PORT0 serves as
the address (A) and address/data (AD) bus in multiplexed
bus modes and as the data (D) bus in demultiplexed bus
modes.
Demultiplexed bus modes:
8-bit data bus: P0H = I/O, P0L = D7 - D0
16-bit data bus: P0H = D15 - D8, P0L = D7 - D0
Multiplexed bus modes:
8-bit data bus: P0H = A15 - A8, P0L = AD7 - AD0
16-bit data bus: P0H = AD15 - AD8, P0L = AD7 - AD0
PORT1
IO
P1L.0-7 118-
125
P1H.0-7 128-
135
P1H.4 132 I
P1H.5 133 I
P1H.6 134 I
P1H.7 135 I
PORT1 consists of the two 8-bit bidirectional I/O ports P1L
and P1H. 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. PORT1 is used as the 16-bit
address bus (A) in demultiplexed bus modes and also after
switching from a demultiplexed bus mode to a multiplexed
bus mode.
The following PORT1 pins also serve for alternate functions:
CC24IO CAPCOM2: CC24 Capture Input
CC25IO CAPCOM2: CC25 Capture Input
CC26IO CAPCOM2: CC26 Capture Input
CC27IO CAPCOM2: CC27 Capture Input
XTAL2 137 O
XTAL1 138 I
XTAL2: Output of the oscillator amplifier circuit.
XTAL1: Input to the oscillator amplifier and input to the
internal clock generator
To clock the device from an external source, drive XTAL1,
while leaving XTAL2 unconnected. Minimum and maximum
high/low and rise/fall times specified in the AC
Characteristics must be observed.
Data Sheet
14
V3.3, 2005-02