參數(shù)資料
型號(hào): M37210M3-902SP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
中文描述: 單芯片8位CMOS微機(jī)電壓合成與屏幕顯示控制器
文件頁(yè)數(shù): 9/59頁(yè)
文件大?。?/td> 764K
代理商: M37210M3-902SP
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
9
Table 1. Interrupt vector addresses and priority
Interrupt sources
Reset
CRT interrupt
INT
2
interrupt
INT
1
interrupt
Timer 4 interrupt
f(X
IN
)/4096 interrupt
V
SYNC
interrupt
Timer 3 interrupt
Timer 2 interrupt
Timer 1 interrupt
Serial I/O interrupt
BRK instruction interrupt
Remarks
Non-maskable
Active edge selectable
Active edge selectable
Active edge selectable
Non-maskable software interrupt
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.
Priority
1
2
3
4
5
6
7
8
9
10
11
12
Vector addresses
FFFF
16
, FFFE
16
FFFD
16
, FFFC
16
FFFB
16
, FFFA
16
FFF9
16
, FFF8
16
FFF5
16
, FFF4
16
FFF3
16
, FFF2
16
FFF1
16
, FFF0
16
FFEF
16
, FFEE
16
FFED
16
, FFEC
16
FFEB
16
, FFEA
16
FFE9
16
, FFE8
16
FFDF
16
, FFDE
16
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.
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