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參數(shù)資料
| 型號(hào)： | M3720 |
| 廠(chǎng)商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 1 KEY 1 SOUND |
| 中文描述： | 1鍵1聲 |
| 文件頁(yè)數(shù)： | 17/121頁(yè) |
| 文件大?。?/td> | 1907K |
| 代理商： | M3720 |
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MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
17
INTERRUPTS
Interrupts can be caused by 15 different sources consisting of 3 ex-
ternal, 10 internal, 1 software, and reset. Interrupts are vectored in-
terrupts with priorities as shown in Table 1. Reset is also included in
the table because its operation is similar to an interrupt.
When an interrupt is accepted,
(1) The contents of the program counter and processor status
register are automatically stored into the stack.
(2) The interrupt disable flag I is set to “1” and the corresponding
interrupt request bit is set to “0.”
(3) The jump destination address stored in the vector address enters
the program counter.
Other interrupts are disabled when the interrupt disable flag is set to
“1.”
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. Figures 10 to 13 show the inter-
rupt-related registers.
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
set to “0” by a program, but not set to “1.” The interrupt enable bit can
be set to “0” and “1” by a program.
Reset is treated as a non-maskable interrupt with the highest priority.
Figure 9 shows interrupt control.
Interrupt Causes
(1) V
SYNC
and CRT interrupts
The V
SYNC
interrupt is an interrupt request synchronized with
the vertical sync signal.
The CRT interrupt occurs after character block display to the CRT
is completed.
(2) INT1, INT2 interrupts
With an external interrupt input, the system detects that the level
of a pin changes from “L” to “H” or from “H” to “L,” and generates
an interrupt request. The input active edge can be selected by
bits 3 and 4 of the interrupt interval determination control register
(address 00D8
16
) : when this bit is “0,” a change from “L” to “H” is
detected; when it is “1,” a change from “H” to “L” is detected.
Note that all bits are cleared to “0” at reset.
(3) Timer 1, 2, 3 and 4 interrupts
An interrupt is generated by an overflow of timer 1, 2, 3 or 4.
(4) Serial I/O interrupt
This is an interrupt request from the clock synchronous serial
I/O function.
Priority
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Vector Addresses
FFFF
16
, FFFE
16
FFFD
16
, FFFC
16
FFFB
16
, FFFA
16
FFF9
16
, FFF8
16
FFF7
16
, FFF6
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
FFE7
16
, FFE6
16
FFE3
16
, FFE2
16
FFDF
16
, FFDE
16
Interrupt Source
Reset
CRT interrupt
INT1 interrupt
INT2 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
Multi-master I
2
C-BUS interface interrupt
Timer 5 · 6 interrupt
BRK instruction interrupt
Note :
Switching a source during a program causes an unnecessary interrupt. Therefore, set a source at initializing of program.
Remarks
Non-maskable
Active edge selectable
Active edge selectable
Active edge selectable
Source switch by software (See note)
Non-maskable (software interrupt)
Table 1. Interrupt Vector Addresses and Priority
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M3720-1 | 1 KEY 1 SOUND |
| M3720-10 | 1 KEY 1 SOUND |
| M3720-2 | 1 KEY 1 SOUND |
| M3720-3 | 1 KEY 1 SOUND |
| M3720-4 | 1 KEY 1 SOUND |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M3720-1 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:1 KEY 1 SOUND |
| M3720-10 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:1 KEY 1 SOUND |
| M3720-2 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:1 KEY 1 SOUND |
| M3720-3 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:1 KEY 1 SOUND |
| M3720-4 | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:1 KEY 1 SOUND |
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