SAB80C166W Datasheet, PDF (6/67 Pages) Siemens Semiconductor Group – C16x-Family of High-Performance CMOS 16-Bit Microcontrollers

SAB 80C166W/83C166W
Pin Definitions and Functions (cont’d)
Pin
Symbol
No.
80 - 92, P3.0 –
95 - 97 P3.15
80
81
82
83
84
85
86
87
88
89
90
91
92
95
96
97
98 – 5
8 – 15
P0.0 –
P0.15
54
V_AREF
55
V_AGND
Input (I) Function
Output (O)
I/O
Port 3 is a 16-bit bidirectional I/O port. It is bit-wise
I/O
programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into high-
impedance state.
The following Port 3 pins also serve for alternate functions:
I
P3.0
T0IN
CAPCOM Timer T0 Count Input
O
P3.1
T6OUT GPT2 Timer T6 Toggle Latch Output
I
P3.2
CAPIN GPT2 Register CAPREL Capture Input
O
P3.3
T3OUT GPT1 Timer T3 Toggle Latch Output
I
P3.4
T3EUD GPT1 Timer T3 Ext.Up/Down Ctrl.Input
I
P3.5
T4IN
GPT1 Timer T4 Input for
Count/Gate/Reload/Capture
I
P3.6
T3IN
GPT1 Timer T3 Count/Gate Input
I
P3.7
T2IN
GPT1 Timer T2 Input for
Count/Gate/Reload/Capture
O
P3.8
TxD1
ASC1 Clock/Data Output (Asyn./Syn.)
I/O
P3.9
RxD1 ASC1 Data Input (Asyn.) or I/O (Syn.)
O
P3.10
T×D0
ASC0 Clock/Data Output (Asyn./Syn.)
I/O
P3.11 R×D0 ASC0 Data Input (Asyn.) or I/O (Syn.)
O
P3.12 BHE
Ext. Memory High Byte Enable Signal,
O
P3.13 WR
External Memory Write Strobe
I
P3.14 READY Ready Signal Input
O
P3.15 CLKOUT System Clock Output (=CPU Clock)
I/O
Port 0 is a 16-bit bidirectional IO 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.
In case of an external bus configuration, Port 0 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:
Data Path Width: 8-bit
16-bit
P0.0 – P0.7:
D0 – D7
D0 - D7
P0.8 – P0.15:
output!
D8 - D15
Multiplexed bus modes:
Data Path Width: 8-bit
16-bit
P0.0 – P0.7:
AD0 – AD7
AD0 - AD7
P0.8 – P0.15:
A8 - A15
AD8 - AD15
-
Reference voltage for the A/D converter.
-
Reference ground for the A/D converter.
Semiconductor Group
6