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參數(shù)資料
| 型號(hào)： | mPD789324 |
| 廠商： | NEC Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| 中文描述： | 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存 |
| 文件頁(yè)數(shù)： | 42/96頁(yè) |
| 文件大?。?/td> | 482K |
| 代理商： | MPD789324 |
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Preliminary Product Information U14673EJ1V0PM00
42
μ
PD789322,789324,789326,789327
(1) Watch timer
An interrupt request (INTWT) is generated at 0.5-second intervals using the 4.19-MHz main system clock or
32.768-kHz subsystem clock.
Caution
When the main system clock is operating at 5.0 MHz, it cannot be used to generate a 0.5-second
interval. In this case, the subsystem clock, which operates at 32.768 kHz, should be used
instead.
(2) Interval timer
The interval timer is used to generate an interrupt request (INTWTI) at preset intervals.
Table 5-7. Interval Time of Interval Timer
Interval Time
At f
X
= 5.0 MHz Operation
At f
X
= 4.19 MHz Operation
At f
XT
= 32.768 kHz Operation
2
4
×
1/f
W
409.6
μ
s
488
μ
s
488
μ
s
2
5
×
1/f
W
819.2
μ
s
977
μ
s
977
μ
s
2
6
×
1/f
W
1.64 ms
1.95 ms
1.95 ms
2
7
×
1/f
W
3.28 ms
3.91 ms
3.91 ms
2
8
×
1/f
W
6.55 ms
7.81 ms
7.81 ms
2
9
×
1/f
W
13.1 ms
15.6 ms
15.6 ms
Remarks 1.
f
W
: Watch timer clock frequency (f
X
/2
2.
f
X
: Main system clock oscillation frequency
3.
f
XT
: Subsystem clock oscillation frequency
7
or f
XT
)
5.4.2 Watch timer configuration
The watch timer consists of the following hardware.
Table 5-8. Watch Timer Configuration
Item
Configuration
Counter
5 bits
×
1
Prescaler
9 bits
×
1
Control register
Watch timer mode control register (WTM)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| mPD789326 | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| MPL135 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
| MPL135-0R4 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
| MPL135-1R0 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
| MPL135-1R5 | Big current (55A), Footprint compatible with most standard, Lower temperature rise at big current, Low DCR, Without noise |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPD789324GB-XXX-8ET | 制造商:NEC 制造商全稱:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER |
| MPD789326 | 制造商:NEC 制造商全稱:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER |
| MPD789326GB-XXX-8ET | 制造商:NEC 制造商全稱:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER |
| MPD789327 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| MPD789327GB-XXX-8ET | 制造商:NEC 制造商全稱:NEC 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLER |
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