UPD78363A datasheet(6/96 Pages) NEC

6 / 96 page

µPD78363A, 78365A, 78366A, 78368A

Can be set in input or output mode in units

of 8 bits. In external memory expansion

mode, this port functions as multiplexed

address/data bus (AD0-AD7).

Can be set in input or output mode in

1-bit units. In external memory expansion

mode, this port functions as address bus

(A8-A15).

Can be set in input or output mode in

1-bit units. In external memory expansion

mode, P90 outputs RD strobe signal, and

P91 outputs WR strobe signal.

Sets port 4 in input or output mode in units

of 8 bits. In external memory expansion

mode, sets memory expansion width of ports

4 and 5.

Sets port 5 in input or output mode in

1-bit units.

• In ordinary operation mode:

MODE0, 1 = LL

• In ROM-less mode:

MODE0, 1 = HH

DIFFERENCES BETWEEN

µPD78363A, 78365A, 78366A, AND 78368A

ROM

Internal ROM

RAM

Input

I/O lines

I/O

Port 4 (P40-P47)

Port 5 (P50-P57)

Port 9 (P90-P93)

Memory expansion

mode register (MM)

Port 5 mode

Setting of

MODE0, MODE1

Product name

Item

24K bytes

32K bytes

48K bytes

None

786 bytes

2K bytes

14 (of which 8 are multiplexed with analog input)

Always functions as multiplexed address/

data bus (AD0-AD7).

Always functions as address bus (A8-A15)

P90 always functions as RD strobe signal

output pin, and P91 always functions as WR

strobe signal output pin. P92 and P93

function as I/O port lines.

Always fixed to external memory expansion

mode.

None

• Always set as follows:

MODE0, 1 = HH

µPD78363A

µPD78366A

µPD78365A

µPD78368A

UPD78363A Datasheet(PDF) 6 Page - NEC

UPD78363A Datasheet(HTML) 6 Page - NEC

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