80C196MD datasheet(15/41 Pages) INTEL

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8XC196MH INDUSTRIAL MOTOR CONTROL CHMOS MICROCONTROLLER

P0.7

P0.6

P0.5

P0.4

P0.3:0

Port 0. This is a high-impedance, input-only port. Port 0 pins

should not be left floating.

These pins may individually be used as analog inputs

(ACH

x) or digital inputs (P0.x). While it is possible for the pins

to function simultaneously as analog and digital inputs, this is

not recommended because reading port 0 while a conversion

is in process can produce unreliable conversion results.

ANGND and V

REF must be connected for port 0 and the A/D

converter to function.

ACH7/T1DIR/PMODE.3

ACH6/T1CLK/PMODE.2

ACH5/PMODE.1

ACH4/PMODE.0

ACH3:0

P1.3

P1.2

P1.1

P1.0

Port 1. This is a 4-bit, bidirectional, standard I/O port that is

multiplexed with individually selectable special-function

signals. (Used as PBUS.15:12 in Auto-programming Mode.)

RXD1

TXD1

RXD0

TXD0

P2.7

P2.6

P2.5

P2.4

P2.3

P2.2

P2.1

P2.0

I/O

Port 2. This is an 8-bit, bidirectional, standard I/O port that is

multiplexed with individually selectable special-function

signals. P2.6 is multiplexed with a special test mode function.

To prevent accidental entry into test modes, always configure

P2.6 as an output.

SCLK1#/BCLK1

COMP2/CPVER

COMP1/PACT#

COMP0/AINC#

COMP3

EPA1/PROG#

SCLK0#/BCLK0/PALE#

EPA0/PVER

P3.7:0

I/O

Port 3. This is an 8-bit, bidirectional, memory-mapped I/O

port with open-drain outputs. The pins are shared with the

multiplexed address/data bus, which has complementary

drivers.

In programming modes, port 3 serves as the low byte of the

programming bus (PBUS).

AD7:0/PBUS.7:0

P4.7:0

I/O

Port 4. This is an 8-bit, bidirectional, memory-mapped I/O

port with open-drain outputs. The pins are shared with the

multiplexed address/data bus, which has complementary

drivers.

In programming modes, port 4 serves as the high byte of the

programming bus (PBUS).

AD15:8/PBUS.15:8

P5.7

P5.6

P5.5

P5.4

P5.3

P5.2

P5.1

P5.0

I/O

Port 5. This is an 8-bit, bidirectional, standard I/O port that is

multiplexed with individually selectable control signals.

Because P5.4 is multiplexed with the ONCE# function,

always configure it as an output to prevent accidental entry

into ONCE mode.

BUSWIDTH

READY

BHE#/WRH#

ONCE#

RD#

WR#/WRL#

INST

ALE/ADV#

Table 7. Signal Descriptions (Continued)

Signal

Name

Type

Description

Multiplexed

With

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