參數(shù)資料
型號(hào)： UPD780032AY
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位單晶片微控制器
文件頁(yè)數(shù)： 31/70頁(yè)
文件大?。?/td> 527K
代理商： UPD780032AY
31
μ
PD780031AY, 780032AY, 780033AY, 780034AY
Data Sheet U14045EJ1V0DS00
7. EXTERNAL DEVICE EXPANSION FUNCTION
The external device expansion function is for connecting external devices to areas other than the internal ROM,
RAM, and SFR. Ports 4 to 6 are used for external device connection.
8. STANDBY FUNCTION
The following two standby modes are available for further reduction of system current consumption.
HALT mode: In this mode, the CPU operation clock is stopped. The average current consumption can be
reduced by intermittent operation by combining this mode with the normal operation mode.
STOP mode: In this mode, oscillation of the main system clock is stopped. All the operations performed on
the main system clock are suspended, and only the subsystem clock is used, resulting in
extremely small power consumption. This can be used only when the main system clock is
operating (the subsystem clock oscillation cannot be stopped).
Figure 8-1. Standby Function
9. RESET FUNCTION
The following two reset methods are available.
External reset by RESET signal input
Internal reset by watchdog timer runaway time detection
10. MASK OPTION
Table 10.1 Pin Mask Option Selection
Pins
Mask Option
P30, P31
An on-chip pull-up resistor can be specified in 1-bit units.
The mask option can be used to specify the connection of an on-chip pull-up resistor to P30, P31, in 1-bit units.
Main system clock
operation
STOP mode
Main system clock
operation is stopped
Interrupt
request
Interrupt
request
HALT
instruction
HALT
instruction
Interrupt
request
STOP
instruction
CSS = 1
CSS = 0
Subsystem clock
operation
HALT mode
HALT mode
Clock supply for CPU is stopped,
oscillation is maintained
Clock supply for CPU is stopped,
oscillation is maintained
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