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參數(shù)資料
| 型號： | W742C813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4-BIT, MROM, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數(shù)： | 19/56頁 |
| 文件大小： | 455K |
| 代理商： | W742C813 |
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W742E/C813
Publication Release Date: December 2000
- 19 -
Revision A1
Q1
Q2
Q9
Q10 Q11 Q12
Q14
Q13
Fosc
S
R
Q
HEF.0
IEF.0
1. Reset
2. CLR EVF,#01H
3. CLR DIVR0
EVF.0
Hold mode release (HCF.0)
Divider interrupt
. . .
Overflow signal
WDT
Enable
Disable
SCR.2
Fosc/2048
Fosc/16384
Option code is reset to "0"
Qw1
R
Qw2
R
Qw4
R
Qw3
R
Divider0
System Reset
1. Reset
2. CLR WDT
Option code is set to "1"
Figure 5-5 Organization of Divider0 and watchdog timer
5.12 Timer/Counter
5.12.1 Timer 0 (TM0)
Timer 0 (TM0) is a programmable 8-bit binary down-counter. The specified value can be loaded into
TM0 by executing the
MOV TM0L(TM0H),R
instructions. When the MOV TM0L(TM0H),R instructions
are executed, it will stop the TM0 down-counting (if the TM0 is down-counting) and reset the MR0.3 to
0, and the specified value can be loaded into TM0. Then we can set MR0.3 to 1, that will cause the
event flag 1 (EVF.1) is reset and the TM0 starts to down count. When it decrements to FFH, Timer 0
stops operating and generates an underflow (EVF.1 = 1). Then, if the Timer 0 interrupt enable flag has
been set (IEF.1 = 1), the interrupt is executed, while if the hold release enable flag 1 has been set
(HEF.1 = 1), the hold state is terminated. The Timer 0 clock input can be set as F
OSC
/1024 or F
OSC
/4
by setting MR0 bit 0. The default timer value is F
OSC
/4. The organization of Timer 0 is shown in Figure
5-6.
If the Timer 0 clock input is F
OSC
/4:
Desired Timer 0 interval = (preset value +1)
×
4
×
1/F
OSC
If the Timer 0 clock input is F
OSC
/1024:
Desired Timer 0 interval = (preset value +1)
×
1024
×
1/F
OSC
Preset value: Decimal number of Timer 0 preset value
F
OSC
: Clock oscillation frequency
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W742C814 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
| W742C816 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| W742C818 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| W742C81A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742CE811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
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