參數(shù)資料
型號: μPD780984
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機(jī)微控制器
文件頁數(shù): 33/48頁
文件大?。?/td> 256K
代理商: ΜPD780984
33
μ
PD780984, 780986, 780988
7. EXTERNAL DEVICE EXPANSION FUNCTION
The external device expansion functions connect external devices to areas other than the internal ROM, RAM and
SFR.
Ports 4 to 6 are used to connect external devices.
8. STANDBY FUNCTIONS
There are the following two standby functions to reduce the current consumption.
HALT mode:
Stops the CPU operating clock. The average current consumption can be reduced by
intermittent operation in combination with the normal operating mode.
STOP mode:
Stops the system clock oscillation. The whole operation by the system clock is stopped, so that
the system may operate with ultra-low power dissipation.
Figure 8-1. Standby Functions
9. RESET FUNCTIONS
There are the following two reset methods.
External reset by RESET pin.
Internal reset by watchdog timer runaway time detection
System Clock Operation
STOP Instruction
Interrupt
Request
STOP Mode
(System clock oscillation
is stopped)
HALT Instruction
Interrupt
Request
HALT Mode
(Clock supply to CPU is stopped,
and oscillation is maintained)
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