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参数资料
| 型号： | MB90F457PMT |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP48 |
| 封装： | 0.50 MM PITCH, PLASTIC, LQFP-48 |
| 文件页数： | 39/78页 |
| 文件大小： | 680K |
| 代理商： | MB90F457PMT |
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MB90455 Series
44
9.
DTP/External Interrupt Outline
DTP/external interrupt transfers an interrupt request generated by an external peripheral device or a data trans-
mission request to CPU, generating external interrupt request and activating expanded intelligent I/O service.
DTP/external interrupt function
An interrupt request input from external peripheral device to external input pins (INT7 to INT4), just as interrupt
request of peripheral device, generates an interrupt request. The interrupt request generates an external interrupt
and activates expanded intelligent I/O service (EI2OS).
If the expanded intelligent I/O service (EI2OS) has been disabled by interrupt control register (ICR: ISE=0),
external interrupt function is enabled and branches to interrupt processing.
If the EI2OS has been enabled, (ICR: ISE=1), DTP function is enabled and automatic data transmission is
performed by EI2OS. After performing specified number of data transmission processes, the process branches
to interrupt processing.
DTP/external interrupt
External interrupt
DTP function
Input pin
4 pins (INT4 to INT7)
Interrupt cause
Specify for each pin with detection level setting register (ELVR).
Input of “H” level/“L” level/rising edge/falling
edge.
Input of “H” level/ “L” level
Interrupt number
#24 (18H) , #27 (1BH)
Interrupt control
Enabling or disabling output of interrupt request, using DTP/external interrupt permission
register (ENIR).
Interrupt flag
Retaining interrupt cause with DTP/external interrupt cause register (EIRR).
Process selection
Disable EI2OS (ICR: ISE=0)
Enable EI2OS (ICR: ISE=1)
Process
Branch to external interrupt process
After automatic data transmission by EI2OS for
specified number of times, branch to interrupt
process.
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