M37211M2 View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

M37211M2

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

Renesas Electronics 

MITSUBISHI MICROCOMPUTERS

M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP

M37210E4-XXXSP/FP, M37210E4SP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

with ON-SCREEN DISPLAY CONTROLLER

INTERRUPTS

Interrupts can be caused by 12 different sources consisting of 3 ex-

ternal, 7 internal, 1 software, and reset.

Interrupts are vectored interrupts with priorities shown in Table 1. Re-

set is also included in the table because its operation is similar to an

interrupt.

When an interrupt is accepted, the registers are pushed, interrupt

disable flag I is set, and the program jumps to the address specified

in the vector table. The interrupt request bit is cleared automatically.

The reset can never be disabled. Other interrupts are disabled when

the interrupt disable flag is set.

All interrupts except the BRK instruction interrupt have an interrupt

request bit and an interrupt enable bit. The interrupt request bits are

in interrupt request registers 1 and 2 and the interrupt enable bits are

in interrupt control registers 1 and 2. Figure 4 shows the structure of

the interrupt request registers 1 and 2 and interrupt control registers

1 and 2.

Interrupts other than the BRK instruction interrupt and reset are ac-

cepted when the interrupt enable bit is “1”, interrupt request bit is “1”,

and the interrupt disable flag is “0”. The interrupt request bit can be

reset with a program, but not set. The interrupt enable bit can be set

and reset with a program.

Reset is treated as a non-maskable interrupt with the highest priority.

Figure 5 shows interrupts control.

Table 1. Interrupt vector addresses and priority

Interrupt sources

Reset

CRT interrupt

INT2 interrupt

INT1 interrupt

Timer 4 interrupt

f(XIN)/4096 interrupt

VSYNC interrupt

Timer 3 interrupt

Timer 2 interrupt

Timer 1 interrupt

Serial I/O interrupt

BRK instruction interrupt

Priority

1

2

3

4

5

6

7

8

9

10

11

12

Vector addresses

FFFF16, FFFE16

FFFD16, FFFC16

FFFB16, FFFA16

FFF916, FFF816

FFF516, FFF416

FFF316, FFF216

FFF116, FFF016

FFEF16, FFEE16

FFED16, FFEC16

FFEB16, FFEA16

FFE916, FFE816

FFDF16, FFDE16

Non-maskable

Remarks

Active edge selectable

Active edge selectable

Active edge selectable

Non-maskable software interrupt

9

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