W78958BF Просмотр технического описания (PDF) - Winbond

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производитель

W78958BF

8-BIT EMULATION MICROCONTROLLER

Winbond 

W78958B

RST, XTAL1, XTAL2

TYPE

MODE

Advanced

-

Standard

-

DESCRIPTION

Functions same as in W78C32.

Functions same as in W78C52.

P0.7−P0.0 Port 0, Bits 7−0

TYPE

MODE

DESCRIPTION

Advanced

Normal

Functions are the same as those in the W78C32, except that a

multiplexed address/data bus is not provided during accesses to

external memory.

Emulation Frozen in the original state.

Standard

Normal

Pins ROMS1 (P8.1) and ROMS0 (P8.0) determine functions of P0.7−

P0.0. For details, see Table D1.

Emulation When ESEL is held at "H" level, P0.7−P0.0 are floating.

P1.7−P1.0 Port 1, Bits 7−0

TYPE

MODE

DESCRIPTION

Advanced

Normal Functions are the same as those in the W78C32.

Emulation Frozen in the original state.

Standard

Normal Functions are the same as those in the W78C52.

Emulation Frozen in the original state.

P2.7−P2.0 Port 2, Bits 7−0

TYPE

MODE

DESCRIPTION

Advanced

Normal

Functions are the same as those in the W78C32, except that a high-

byte address bus is not provided during accesses to external

memory.

Emulation Frozen in the original state.

Standard

Normal

Pins ROMS1 and ROMS0 determine functions of P2.7−P2.0. For

details, see Table D1.

Emulation

When ESEL is held at "H" level, the states of P2.7−P2.0 depend on

the MP2 (Mask Port 2) register. At this time, if the bit content of MP2

is 0, the corresponding pin of Port 2 maintains in the original state;

otherwise, the corresponding pin of Port 2 is in high impedance state.

Publication Release Date: September 1997

-5-

Revision A3

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