HD6475328CG Datasheet, PDF (157/459 Pages) Hitachi Semiconductor – Manual Gives a Hardware Description

Table 9-1 Input/Output Port Summary
Expanded Modes
Single-Chip Mode
Port Description
Pins
Mode 1 Mode 2 Mode 3 Mode 4 (Mode 7)
Port 1 8-Bit input/output P17 / TMO These input/output pins double as and
P16 / IRQ1 inputs and as IRQ0 and IRQ1 input and
P15 / IRQ0 output pin (TMO) for the 8-bit timer.
P14 / WAIT These pins function as WAIT, BREQ, Input/output
P13 / BREQ and BACK when necessary control- port
P12 / BACK register bits are set to “1.”
P11 / E
These pins function as input pins or as
P10 / ø
clock (E, ø) output pins, depending on
the data direction register setting.
Port 2 5-Bit input/output P24 / WR Bus control signal outputs
Input/output
port
P23 / RD (WR, RD, DS, R/W, AS)
port
P22 / DS
P21 / R/W
P20 / AS
Port 3 8-Bit input/output P37 - P30 / Data bus (D7 – D0)
Input/output
port
D7 – D0
port
Port 4 8-Bit input/output P47 – P40 / Low address bits (A7 – A0)
Input/output
port
A7 – A0
port
Can drive a LED
Port 5 8-Bit input/output P57 – P50 / High High High High
Input/output
port
A15 – A8 address address address address port
Built-in input
bus bus if bus bus if
pull-up (MOS)
(A15 – DDR is (A15 – DDR is
A8) set to “1” A8) set to “1”
Port 6 4-Bit input/output P63 –P60 / Input/output port Page Page
Input/output
port
A19 – A16
address address port
Built-in input
bus bus if DDR
pull-up (MOS)
(A19 – is set to “1,”
A16) input port if
DDR is set
to “0”
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