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參數(shù)資料
| 型號： | EM73361A |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| 中文描述： | 4位微控制器的液晶產(chǎn)品 |
| 文件頁數(shù)： | 19/33頁 |
| 文件大?。?/td> | 290K |
| 代理商： | EM73361A |
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* This specification are subject to be changed without notice.
10.8.2001
EM73361A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Tone frequency register
The 8-bit tone frequency register is P24 and P23. The tone frequency will be changed when user output the
different data to P23. Thus, the data must be output to P24 before P23 when user want to change the 8-bit
tone frequency (TF).
Port24
Port23
2
3 2 1
Higher nibble register
0
3
Lower nibble register
1
0
Initial value : 1111 1111
** f1=XIN/(TF+1), TF=1~255, TF
≠
0
** Example : XIN=32K Hz, TF=00110001B.
fo=32K Hz/50=655.36 Hz
WATCH-DOG-TIMER (MASK OPTION)
Watch-dog-timer can help user to detect the malfunction (runaway) of CPU and give system a time up signal every
certain time . User can use the time up signal to give system a reset signal when system is fail. When CPU is reseted
or sleeping, the watch-dog-timer is disabled. Users must enable the watch-dog-timer by self when CPU is waked
up.
The basic structure of watch-dog-timer control is composed by a 4-stage binary counter and a control unit . the
WDT counter counts for a certain time to check the CPU status, if there is no malfunction happened, the counter
will be cleared and counting . Otherwise, if there is a malfunction happened, the WDT control will send a WDT
signal ( low active ) to outside, user can use this signal to reset CPU . The WDT checking period is assign by
P21 ( WDT command port )
P21 is the control port of watchdog timer, and the watchdog timer timeup signal is output by P4.1/WDT, user can
use this timeup signal (active low) to reset CPU and initialize system.
Port 21
3
2
1
0
Initial value :0000
CWC
*
*
WDT
CWC
0
1
Clear watchdog timer counter
Clear counter then return to 1
Nothing
WDT
0
1
Set watchdog timer detect time
3 x 2
13
/fc=3 x 2
13
/32 KHz=0.75 sec
7 x 2
13
/fc=7 x 2
13
/32K Hz=1.75 sec
P4.1 OUTPUT
DATA LATCH
P4.1
0 1 2 3
counter clear request
WDT CONTROL
system reset
P4.1 OUTPUT DATA
command PORT
P21
WDT counter
fc/2
R
S
Q
F/F
13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EM73361AAQ | 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73361 | Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示驅(qū)動，工作電壓2.2V-3.6V的單片CMOS 4位微控制器) |
| EM73362 | Single Chip CMOS 4-Bit Micro-Controller for LCD Product(用于LCD顯示驅(qū)動，工作電壓1.1V或1.8V的單片CMOS 4位微控制器) |
| EM73400 | 4-Bit Micro-Controller for General-Purpose Product(用于通訊產(chǎn)品，家用電器，消費(fèi)類產(chǎn)品的工作電壓4.5-5.5V的4位微控制器) |
| EM73460 | 4-Bit Micro-Controller(工作電壓2.4V-5.0V的低功耗高速4位微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM73361AAQ | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73362 | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73461A | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73461B | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| EM73469A | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
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