Datasheet

Rev. 4.00 Sep 27, 2006 page x of xliv
Item Page Revision (See Manual for Details)
8.1 Overview
Table 8.3 H8S/2144 Port
Functions
220 Table 8.3 amended
Expanded Modes Single-Chip Mode
Port Description Pins
Mode 1
Mode 2, Mode 3
(EXPE = 1)
Mode 2, Mode 3
(EXPE = 0)
Port A • 8-bit I/O port PA7 to PA0/
A23 to A16/
KIN15 to KIN8/
CIN15 to CIN8
I/O port also
functioning as
key-sense
interrupt input
(KIN15 to
KIN8), and
expansion A/D
converter input
(CIN15 to
CIN8)
I/O port also
functioning as
address output (A23
to A16), key-sense
interrupt input
(KIN15 to KIN8),
and expansion A/D
converter input
(CIN15 to CIN8)
I/O port also functioning as
key-sense interrupt input
(KIN15 to KIN8) and
expansion A/D converter
input (CIN15 to CIN8)
8.7.2 Register
Configuration
Table 8.14 Port 6
Registers
247 Table 8.14 amended
(Before) System control register → (After) System control
register 2
8.9.3 Pin Functions
Table 8.19 Port 8 Pin
Functions
258 P81/GA20/CS2 selection method and pin function description
amended
Pin Selection Method and Pin Functions
P81/GA20/CS2 The pin function is switched as shown below according to the combination of
operating mode, bit CS2E
in SYSCR, bit FGA20E in HICR of the HIF, and bit
P81DDR.
Operating
mode
Not slave mode Slave mode
FGA20E — 01
CS2E — 01—
P81DDR 0 1 0 1 — 01
Pin function P81
input
pin
P81
output
pin
P81
input
pin
P81
output
pin
CS2
input
pin
P81
input
pin
GA20
output
pin
This pin should be used as the GA20 output pin or CS2 input pin only in mode
2 or 3 (EXPE = 0).