UPD75236GJ データシートの表示（PDF） - NEC => Renesas Technology

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UPD75236GJ

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75236

Table 2-4 µPD75236 I/O Map (1/5)

Address

Hardware Name (Symbol)

b3

b2

b1

b0

F80H

Stack pointer (SP)

R/W No. of Manipulatable Bits Bit Manipulated

1 Bit 4 Bits 8 Bits Addressing

Remarks

R/W

—

—

q

Be sure to write 0 to bit 0.

F82H

Register bank select register (RBS)

—

R*1

F83H

Memory bank select register (MBS)

—

F84H

Stack bank select register (SBS) R/W

—

F85H

F86H

Basic interval timer mode

register (BTM)

Basic interval timer (BT)

W

v

R

—

q

q

q

q

—

q

—

—

q

mem.bit

*2

5

Be sure to write 0 to

bits 3 and 2.

Only bit 3 is bit-manipula-

table.

F88H

Display mode register (DSPM)

W

—

F89H

Dimmer select register (DIMS)

W

—

F8AH

KSF Digit select register

(DIGS)

R/W

v

F90H

Timer pulse generator mode

register (TPGM)

W

v

F94H

Timer pulse generator modulo

R/W

—

register L (MODL)

F96H

Timer pulse generator modulo

R/W

—

register H (MODH)

F98H

Watch mode register (WM)

W

—

q

—

q

—

q

—

v

q

—

q

—

q

—

q

mem.bit

mem.bit

Only bit 3 is bit-

testable.

Only bit 3 is bit-manipu-

latable.

* 1. Can be read/written by the SEL instruction.

2. Individually manipulatable as RBS and MBS by 4-bit manipulation.

Manipulatable as BS by 8-bit manipulation.

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