SAB80C166-M-T3 SIEMENS [Siemens Semiconductor Group], SAB80C166-M-T3 Datasheet - Page 7

• Manufacturer Part Number: SAB80C166-M-T3
• Description: 16-Bit CMOS Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Pin Definitions and Functions (cont’d)
Symbol
P3.0 –
P3.15
P0.0 –
P0.15
V
V
Semiconductor Group
AREF
AGND
Pin
Number
80-92,
95-97
80
81
82
83
84
85
86
87
88
89
90
91
92
95
96
97
98 – 5
8 – 15
54
55
Input
Output
I/O
I/O
I
O
I
O
I
I
I
I
O
I/O
O
I/O
O
O
I
O
I/O
-
-
Function
Port 3 is a 16-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.
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
P3.13
P3.14
P3.15
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:
P0.0 – P0.7:
P0.8 – P0.15:
Multiplexed bus modes:
Data Path Width:
P0.0 – P0.7:
P0.8 – P0.15:
Reference voltage for the A/D converter.
Reference ground for the A/D converter.
T0IN
T6OUT GPT2 Timer T6 Toggle Latch Output
CAPIN GPT2 Register CAPREL Capture Input
T3OUT GPT1 Timer T3 Toggle Latch Output
T3EUD GPT1 Timer T3 Ext.Up/Down Ctrl.Input
T4IN
T3IN
T2IN
TxD1
RxD1
T D0
R D0
BHE
WR
READY Ready Signal Input
CLKOUT System Clock Output (=CPU Clock)
6
CAPCOM Timer T0 Count Input
GPT1 Timer T4 Input for
Count/Gate/Reload/Capture
GPT1 Timer T3 Count/Gate Input
GPT1 Timer T2 Input for
Count/Gate/Reload/Capture
ASC1 Clock/Data Output (Asyn./Syn.)
ASC1 Data Input (Asyn.) or I/O (Syn.)
ASC0 Clock/Data Output (Asyn./Syn.)
ASC0 Data Input (Asyn.) or I/O (Syn.)
Ext. Memory High Byte Enable Signal
External Memory Write Strobe
8-bit
D0 – D7
output!
8-bit
AD0 – AD7
A8 - A15
SAB 80C166/83C166
16-bit
D0 - D7
D8 - D15
16-bit
AD0 - AD7
AD8 - AD15