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| 型号： | M37481M8-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | 10 X 10 MM, 0.80 MM PITCH, PLASTIC, QFP-44 |
| 文件页数： | 33/100页 |
| 文件大小： | 1457K |
| 代理商： | M37481M8-XXXFP |
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35
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
A transmit data collision is detected between LSB and MSB of
transmit data in the clock synchronous serial I/O mode or between
the start bit and stop bit of transmit data in the UART mode. Bus
collision detection can be performed by both the internal clock and
the external clock.
A block diagram is shown in Figure 34. A timing diagram is shown
in Figure 35. A bus collision detection control register is shown in
Figure 36.
Fig. 34 Block diagram of bus arbitration interrupt circuit
Fig. 36 Structure of bus collision detection control register
TXD
RXD
Shift clock
D
Q
Bus arbitration interrupt
request
Bus collision detection
enable bit
TE
Transmit shift clock
Transmit pin TxD
Receive pin RxD
Bus arbitration interrupt
generation
Data collision
Bus Collision Detection
The 7480/7481 group can detect a bus collision by setting the bus
collision detection enable bit to “1”.
When transmission is started in the clock synchronous or asyn-
chronous (UART) serial I/O mode, the transmit pin TxD is
compared with the receive pin RxD in synchronization with a rising
edge of transmit shift clock. If they do not coincide with each other,
a bus arbitration interrupt request occurs (bus collision detection).
Fig. 35 Timing diagram of bus arbitration interrupt
b7
b0
Bus collision detection control register
(BUSARBCON address 00E5 16)
Bus collision detection enable bit
0 : Collision detection disabled
1 : Collision detection enabled
Not used (“0” at read)
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PDF描述 |
|---|---|
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| MB95F204KP-G-SH-SNE2 | 8-BIT, FLASH, 16.25 MHz, MICROCONTROLLER, PDIP24 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37481M8-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 |
| M37481MT-088FP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37481MXT-XXXSP | 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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