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参数资料
| 型号： | M37478M8TXXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP56 |
| 封装： | PLASTIC, QFP-56 |
| 文件页数： | 7/50页 |
| 文件大小： | 693K |
| 代理商： | M37478M8TXXXFP |
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12
MITSUBISHI MICROCOMPUTERS
7477/ 7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
When the device is put into power-down state by the STP instruc-
tion or the WIT instruction, if bit 5 in the edge polarity selection
register is “1”, the INT1 interrupt becomes a key on wake up inter-
rupt. When a key on wake up interrupt is valid, an interrupt request
is generated by applying the “L” level to any pin in port P0. In this
case , the port used for interrupt must have been set for the input
mode.
If bit 5 in the edge polarity selection register is “0” when the device
is in power-down state, the INT1 interrupt is selected. Also, if bit 5
in the edge polarity selection register is set to “1” when the device
is not in a power-down state, neither key on wake up interrupt re-
quest nor INT1 interrupt request is generated.
The CNTR0/CNTR1 interrupts function in the same as INT0 and
INT1. The interrupt input pin can be specified for either CNTR0 or
CNTR1 pin by setting bit 4 in the edge polarity selection register.
Figure 4 shows the structure of the edge polarity selection regis-
ter, interrupt request registers 1 and 2, and interrupt control
registers 1 and 2.
Interrupts other than the BRK instruction interrupt and reset are
accepted 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 pri-
ority. Figure 5 shows interrupts control.
Interrupt source
______
RESET
INT0 interrupt
INT1 interrupt or key on wake up interrupt
CNTR0 interrupt or CNTR1 interrupt
Timer 1 interrupt
Timer 2 interrupt
Timer 3 interrupt
Timer 4 interrupt
Serial I/O receive interrupt
Serial I/O transmit interrupt
A-D conversion completion 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
FFF716, FFF616
FFF516, FFF416
FFF316, FFF216
FFF116, FFF016
FFEF16, FFEE16
FFED16, FFEC16
FFEB16, FFEA16
FFE916, FFE816
Remarks
Non-maskable
External interrupt (polarity programmable)
External interrupt (INT1 is polarity programmable)
External interrupt (polarity programmable)
Non-maskable software interrupt
Table 1. Interrupt vector address and priority.
INTERRUPTS
Interrupts can be caused by 13 different sources consisting of five
external, seven internal, and one software sources.
Interrupts are vectored interrupts with priorities shown in Table 1.
Reset 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 speci-
fied in the vector table. The interrupt request bit is cleared
automatically. The reset and BRK instruction interrupt can never
be disabled. Other interrupts are disabled when the interrupt dis-
able 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. External interrupts
INT0 and INT1 can be asserted on either the falling or rising edge
as set in the edge polarity selection register. When “0” is set to this
register, the interrupt is activated on the falling edge; when “1” is
set to the register, the interrupt is activated on the rising edge.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37478M8TXXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37478M8TXXXSP/FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37478M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37478M8-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES |
| M37478M8-XXXSP/FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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