80C196MD INTEL [Intel Corporation], 80C196MD Datasheet - Page 15

• Manufacturer Part Number: 80C196MD
• Description: 8XC196MH INDUSTRIAL MOTOR CONTROL CHMOS MICROCONTROLLER
• Manufacturer: INTEL [Intel Corporation]

P0.7
P0.6
P0.5
P0.4
P0.3:0
P1.3
P1.2
P1.1
P1.0
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
P3.7:0
P4.7:0
P5.7
P5.6
P5.5
P5.4
P5.3
P5.2
P5.1
P5.0
Signal
Name
®
Type
I/O
I/O
I/O
I/O
I
I
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
converter to function.
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.)
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.
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).
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).
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.
8XC196MH INDUSTRIAL MOTOR CONTROL CHMOS MICROCONTROLLER
Table 7. Signal Descriptions (Continued)
REF
must be connected for port 0 and the A/D
Description
ACH7/T1DIR/PMODE.3
ACH6/T1CLK/PMODE.2
ACH5/PMODE.1
ACH4/PMODE.0
ACH3:0
RXD1
TXD1
RXD0
TXD0
SCLK1#/BCLK1
COMP2/CPVER
COMP1/PACT#
COMP0/AINC#
COMP3
EPA1/PROG#
SCLK0#/BCLK0/PALE#
EPA0/PVER
AD7:0/PBUS.7:0
AD15:8/PBUS.15:8
BUSWIDTH
READY
BHE#/WRH#
ONCE#
RD#
WR#/WRL#
INST
ALE/ADV#
Multiplexed
With
15