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參數資料
| 型號： | W77IE58 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 25 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 60/90頁 |
| 文件大小： | 409K |
| 代理商： | W77IE58 |
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Preliminary W77IE58
- 60 -
1/4
1/12
T0M = CKCON.3
(T1M = CKCON.4)
C/T = TMOD.2
(C/T = TMOD.6)
0
Interrupt
T0 = P3.4
(T1 = P3.5)
TH0
(TH1)
TL0
(TL1)
TF0
(TF1)
TR0 = TCON.4
(TR1 = TCON.6)
GATE = TMOD.3
(GATE = TMOD.7)
INT0 = P3.2
(INT1 = P3.3)
7
0
TFx
7
0
Timer 1 functions are shown in brackets
1
0
1
Clock Source
Mode input
div. by 4 osc/1
div. by 64 osc/16
div. by 1024 osc/256
Figure 12. Timer/Counter Mode 2.
MODE 3
Mode 3 has different operating methods for the two timer/counters. For timer/counter 1, mode 3 simply
freezes the counter. Timer/Counter 0, however, configures TL0 and TH0 as two separate 8 bit count
registers in this mode. The logic for this mode is shown in the figure. TL0 uses the Timer/Counter 0
control bits
C T
/
, GATE, TR0,
INT0
and TF0. The TL0 can be used to count clock cycles (clock/12 or
clock/4) or 1-to-0 transitions on pin T0 as determined by C/T (TMOD.2). TH0 is forced as a clock cycle
counter (clock/12 or clock/4) and takes over the use of TR1 and TF1 from Timer/Counter 1. Mode 3 is
used in cases where an extra 8 bit timer is needed. With Timer 0 in Mode 3, Timer 1 can still be used in
Modes 0, 1 and 2., but its flexibility is somewhat limited. While its basic functionality is maintained, it no
longer has control over its overflow flag TF1 and the enable bit TR1. Timer 1 can still be used as a
timer/counter and retains the use of GATE and INT1 pin. In this condition it can be turned on and off by
switching it out of and into its own Mode 3. It can also be used as a baud rate generator for the serial
port.
Timer/Counter 2
Timer/Counter 2 is a 16 bit up/down counter which is configured by the T2MOD register and controlled by
the T2CON register. Timer/Counter 2 is equipped with a capture/reload capability. As with the Timer 0
and Timer 1 counters, there exists considerable flexibility in selecting and controlling the clock, and in
defining the operating mode. The clock source for Timer/Counter 2 may be selected for either the
external T2 pin (C/T2 = 1) or the crystal oscillator, which is divided by 12 or 4 (C/T2 = 0). The clock is
then enabled when TR2 is a 1, and disabled when TR2 is a 0.
Timer/Counter2 Setting
MODE
R
CLK
+T
CLK
0
0
1
x
CP/RL2
0
1
x
0
T2OE
0
x
0
1
Auto-reload
Capture
Baud Rate Generator
Clock Out Mode
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| W77LE58-25 | 8 BIT MICROCONTROLLER |
| W77LE58F-25 | 8 BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W77IE58_06 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W77J_1G WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77J_2GST WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77J_3G WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W77L032A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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