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參數(shù)資料
| 型號： | W77E58 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8 BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 58/85頁 |
| 文件大小： | 570K |
| 代理商： | W77E58 |
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Preliminary W77E58
- 58 -
AUTO-RELOAD MODE, COUNTING UP
The auto-reload mode as an up counter is enabled by clearing the CP RL
and clearing the DCEN bit in T2MOD register. In this mode, Timer/Counter 2 is a 16 bit up counter.
When the counter rolls over from FFFFh, a reload is generated that causes the contents of the
RCAP2L and RCAP2H registers to be reloaded into the TL2 and TH2 registers. The reload action also
sets the TF2 bit. If the EXEN2 bit is set, then a negative transition of T2EX pin will also cause a
reload. This action also sets the EXF2 bit in T2CON.
/
2 bit in the T2CON register
1/4
1/12
T2M = CKCON.5
1
C/T2 = T2CON.1
0
T2CON.7
T2 = P1.0
T2CON.6
TR2 =
T2CON.2
T2EX = P1.1
EXEN2 = T2CON.3
EXF2
Timer 2
Interrupt
TF2
TH2
TL2
RCAP2H
RCAP2L
0
1
Clock Source
Mode input
div. by 4 osc/1
div. by 64 osc/16
div. by 1024 osc/256
Figure 15. 16-Bit Auto-reload Mode, Counting Up
AUTO-RELOAD MODE, COUNTING UP/DOWN
Timer/Counter 2 will be in auto-reload mode as an up/down counter if CP RL
cleared and the DCEN bit in T2MOD is set. In this mode, Timer/Counter 2 is an up/down counter
whose direction is controlled by the T2EX pin. A 1 on this pin cause the counter to count up. An
overflow while counting up will cause the counter to be reloaded with the contents of the capture
registers. The next down count following the case where the contents of Timer/Counter equal the
capture registers will load an FFFFh into Timer/Counter 2. In either event a reload will set the TF2 bit.
A reload will also toggle the EXF2 bit. However, the EXF2 bit can not generate an interrupt while in
this mode.
2 bit in T2CON is
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W77E58-25 | 8 BIT MICROCONTROLLER |
| W77E58-40 | 8 BIT MICROCONTROLLER |
| W77E58F-25 | 8 BIT MICROCONTROLLER |
| W77E58F-40 | 8 BIT MICROCONTROLLER |
| W77E58P-25 | 8 BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W77E58-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58P-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
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