KS88C4404 MICROCONTROLLER
PRODUCT OVERVIEW
PIN DESCRIPTIONS
Table 1–1. KS88C4404 Pin Descriptions
Pin
Name
Pin
Type
Pin
Description
Circuit
Type
QFP Pin
Number
Share
Pins
P0.0 - P0.7
I/O
Nibble programmable port; input or output mode
selected by software; Schmitt trigger input or push-
pull, open-drain output with software assignable
pull-ups; alternately configurable as external
interface address lines A8 - A15.
3
2, 1,
80-75
A8 - A15
P1.0 - P1.7
P2.0 - P2.7
I/O
I/O
Same general characteristics as port 0; alternately
configurable as external interface address/data lines
AD0 - AD7.
3
5
73-66
AD0 - AD7
AS, DS, MW,
DM, MR,
PM, TA, TB
General I/O port with Schmitt trigger input or push-
pull output. bit programmable;
P2.0 / Address Strobe (AS)
19 - 12
P2.1 / Data Strobe (DS)
P2.2 / Memory Write (MW)
P2.3 / Data Memory select (DM)
P2.4 / Memory Read (MR)
P2.5 / Program Memory select (PM)
P2.6 / timer A output (TA)
P2.7 / timer B output (TB)
P3.0 - P3.7
I/O
General I/O port with bit programmable pins.
Schmitt trigger input or push-pull output with
software assignable pull-ups. Input or output mode
is selectable by software. P3.0 - P3.3 are alternately
used as inputs for external interrupts INT0-INT3,
respectively (with noise filters and interrupt control):
P3.0 / timer C clock input (TCCK) / INT0
P3.1 / timer D clock input (TDCK) / INT1
P3.2 / timer C gate input (TCG) / INT2
4
24-31
(See pin
description)
P3.3 / timer D gate input (TDG) / INT3
P3.6 / Capture data input (CAP)
P3.7 /
for slow memory interface
P4.0 - P4.7
I/O
General I/O port with bit programmable pins.
Schmitt trigger input or push-pull, open-drain output
with software assignable pull-ups. Input or output
mode is selectable by software. P4.0-P4.7 can
alternately be used as inputs for external interrupts
INT4-INT11, respectively (with noise filters and
interrupt control)
4
33-40
INT4 -
INT11
1–7