参数资料
型号: 784215A
厂商: NEC Corp.
英文描述: MOS INTEGRATED CIRCUIT
中文描述: 马鞍山集成电路
文件页数: 50/100页
文件大小: 564K
代理商: 784215A
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
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参数描述
784215AY 制造商:NEC 制造商全称:NEC 功能描述:MOS INTEGRATED CIRCUIT
784216A 制造商:NEC 制造商全称:NEC 功能描述:MOS INTEGRATED CIRCUIT
784216AY 制造商:NEC 制造商全称:NEC 功能描述:MOS INTEGRATED CIRCUIT
784217A 制造商:NEC 制造商全称:NEC 功能描述:MOS INTEGRATED CIRCUIT
784217AY 制造商:NEC 制造商全称:NEC 功能描述:MOS INTEGRATED CIRCUIT