4250 データシートの表示（PDF） - MITSUBISHI ELECTRIC

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4250

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

4250 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

(5) Port F (F0, F1)

2-bit I/O port.

For input use, set the latch of the specified bit to “1.” The output

structure is the N-channel open-drain.

(6) Port S (S0–S3)

4-bit I/O port.

Port S has the logic operation (LGOP) function. For input (logic

operation included) use, set the latch of the specified bit to

“1.” The output structure is the N-channel open-drain. When

performing the logic operation, select the logic operation

function with the logic operation selection register LO. Set the

contents of register LO through register A with the TLOA

instruction.

When the LGOP instruction is executed, the logic operation

selected with the register LO is performed between the

contents of register A and the contents of port S, and its result

is stored in register A.

Logic operation selection register

Logic operation selection register LO

at reset : 002

at RAM back-up : 002

W

LO1

Logic operation function selection bits

LO0

Note: “W” represents write enabled.

LO1 LO0

0 0 XOR operation

0 1 OR operation

1 0 AND operation

1 1 Not available

Functions

MITSUBISHI

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