80C166 datasheet(7/52 Pages) SIEMENS

Part #	80C166

Description	16-Bit CMOS Single-Chip Microcontroller

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

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SAB 80C166/83C166

Semiconductor Group

6

P3.0 –

P3.15

80-92,

95-97

80

81

82

83

84

85

86

87

88

89

90

91

92

95

96

97

I/O

I

O

I

O

I

O

I/O

O

I/O

O

I

O

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

T0IN

CAPCOM Timer T0 Count Input

P3.1

T6OUT GPT2 Timer T6 Toggle Latch Output

P3.2

CAPIN

GPT2 Register CAPREL Capture Input

P3.3

T3OUT GPT1 Timer T3 Toggle Latch Output

P3.4

T3EUD GPT1 Timer T3 Ext.Up/Down Ctrl.Input

P3.5

T4IN

GPT1 Timer T4 Input for

Count/Gate/Reload/Capture

P3.6

T3IN

GPT1 Timer T3 Count/Gate Input

P3.7

T2IN

GPT1 Timer T2 Input for

Count/Gate/Reload/Capture

P3.8

TxD1

ASC1 Clock/Data Output (Asyn./Syn.)

P3.9

RxD1

ASC1 Data Input (Asyn.) or I/O (Syn.)

P3.10

T

×D0

ASC0 Clock/Data Output (Asyn./Syn.)

P3.11

R

×D0

ASC0 Data Input (Asyn.) or I/O (Syn.)

P3.12

BHE

Ext. Memory High Byte Enable Signal

P3.13

WR

External Memory Write Strobe

P3.14

READY Ready Signal Input

P3.15

CLKOUT System Clock Output (=CPU Clock)

P0.0 –

P0.15

98 – 5

8 – 15

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

V

AREF

54

-

Reference voltage for the A/D converter.

V

AGND

55

-

Reference ground for the A/D converter.

Pin Definitions and Functions (cont’d)

Symbol

Number

Input

Output

Function

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80C166 Datasheet(PDF) 7 Page - Siemens Semiconductor Group

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