參數(shù)資料
型號: UPD784217AY
廠商: NEC Corp.
英文描述: 16-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 16位單晶片微控制器
文件頁數(shù): 50/100頁
文件大?。?/td> 561K
代理商: UPD784217AY
Data Sheet U14121EJ2V0DS00
50
μ
PD784214A, 784215A, 784216A, 784217A, 784218A, 784214AY, 784215AY, 784216AY, 784217AY, 784218AY
7.10 Edge Detection Function
The interrupt input pins (INTP0, INTP1, NMI/INTP2, INTP3 to INTP6) are used not only to input interrupt requests
but also to input trigger signals to the internal hardware units. Because these pins operate at an edge of the input
signal, they have a function to detect an edge. Moreover, a noise elimination function is also provided to prevent
erroneous detection due to noise.
Pin Name
Detectable Edge
Noise Elimination
NMI
By analog delay
INTP0 to INTP6
Either or both of rising and falling edges
7.11 Watch Timer
The watch timer has the following functions:
Watch timer
Interval timer
The watch timer and interval timer functions can be used at the same time.
(1) Watch timer
The watch timer sets the WTIF flag of the interrupt control register (WTIC) at time intervals of 0.5 seconds by
using the 32.768 kHz subsystem clock.
(2) Interval timer
The interval timer generates an interrupt request (INTTM3) at predetermined time intervals.
Figure 7-16. Block Diagram of Watch Timer
f
XX
/2
7
Prescaler
f
XT
f
W
2
4
f
W
2
5
f
W
2
6
f
W
2
7
f
W
2
8
f
W
f
W
2
9
5-bit counter
f
W
2
5
f
W
2
14
INTWT
INTTM3
To 16-bit timer/counter
S
S
S
S
相關(guān)PDF資料
PDF描述
UPD784217AYGF 16-BIT SINGLE-CHIP MICROCONTROLLERS
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