M34280M1-XXXFP View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M34280M1-XXXFP

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

Renesas Electronics 

MITSUBISHI MICROCOMPUTERS

4280 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTERS

Timer 1 start

(V10)←1

Timer 1 underflow “1”

“0”

a

b

c

d

“H”

Port CARR output

“L”

a

b

c

d

Set the interval “a” to timer 1.

Select count source CARRY

(V11)←0

Set the interval “b” Set the interval “c” Set the interval “d”

to reload register R1. to reload register R1. to reload register R1.

Auto-control valid

(V12)←1

Carrier wave output start

“1”

Timer 1 underflow “0”

CARRY “H”

“L”

“H”

Port CARR output“L”

“1”

Register V12 “0”

Timer 1 stop

(V10)←0

(Note)

Carrier wave output start

Auto-control invalid Auto-control invalid

Carrier wave output stop

(V12)←0 (V12)←1 (V12)←0 (V12)←1

Note: When timer 1 is stopped, the port CARR output auto-control is terminated regardless of bit 2 (V12) of register V1.

Fig. 16 Port CARR output auto-control by timer 1

LOGIC OPERATION FUNCTION

The 4280 Group has the 4-bit logic operation function. The logic

operation between the contents of register A and the low-order 4

bits of register E is performed and its result is stored in register

A.

Table 5 Logic operation selection register LO

Each logic operation can be selected by setting logic operation

selection register LO.

Set the contents of this register through register A with the TLOA

instruction. The logic operation selected by register LO is

executed with the LGOP instruction.

Table 5 shows the logic operation selection register LO.

Logic operation selection register LO

at reset : 002

at RAM back-up : 002

W

LO1

Logic operation selection bits

LO0

LO1 LO0

Logic operation function

0 0 Exclusive logic OR operation (XOR)

0 1 OR operation (OR)

1 0 AND operation (AND)

1 1 Not available

Note: “W” represents write enabled.

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