參數(shù)資料
型號(hào)： W33D4331
廠(chǎng)商： WINBOND ELECTRONICS CORP
元件分類(lèi)： 顯示驅(qū)動(dòng)器
英文描述： LIQUID CRYSTAL DISPLAY DRIVER, PQFP64
封裝： PLASTIC, QFP-64
文件頁(yè)數(shù)： 2/28頁(yè)
文件大?。?/td> 305K
代理商： W33D4331
W33D0001 SERIES
- 10 -
1.5 Timer mode:
The timer mode is controlled by the ATS pin with first priority. When the ATS pin is high, the timer
function is inhibited meaning the timer data cannot display on the LCD panel. This timer function
exists only when ATS pin is low, the MS pin is high, and Timer bit is equal to zero. Refer to Figure 9.
In timer mode, the elapsed conversation time since the beginning of the call is displayed on the LCD
panel. When the MS pin goes from low to high and the no data is transmitted, the LCD panel will
show a flashing first digit (3 bars).
When the MS pin is high, and no data transmission occur for more than 6 seconds, the timer will
automatically start to count until the MS pin returns to a low state (in this case, the timer data will be
kept for 5 sec. Befor being transferned to clock data). The maximum counting time is 11-59-59, and
cycles to 00-00-00 to start again.
The other method of starting and stopping the timer is by triggering the TIM pin. A high trigger input
on the TIM pin will reverse the current condition of the timer; thus if the timer is counting, a high
trigger on TIM will stop the counter, and vice versa. When the timer is in the initial state and the first
trigger on the TIM pin occurs before the normal mode transmission data, the timer will display the
previous counting number.
Detailed flow charts depicting the above three operating modes are shown in Figure 5 and Figure 6.
2. Reset Function
There are two methods for initializing the chip: one is power-on reset, the other is pulling the RST
pin low (low active).
2.1. Power-on reset
At power on reset , the power-on reset circuit will generate a pulse to reset the chip. All LCD
segments will flash momentarily for about 2 seconds and the built-in clock will start from 1
1 0000
and the normal mode data of 128 dots will be reset to "0".
2.2. RST Pin function
Pulling RST low will reset all of the chip's functions except for the clock. All LCD segments will flash
momentarily for about 2 seconds and the 128 dots will be reset to "0".
3. LCD Format
The LCD panel is 1/3 bias, 1/4 duty. Refer to Figure 10 and Figure 11. The LCD format is shown in
Figure 12.
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