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参数资料
| 型号： | W33D2031 |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 显示驱动器 |
| 英文描述： | LIQUID CRYSTAL DISPLAY DRIVER, PQFP64 |
| 封装： | PLASTIC, QFP-64 |
| 文件页数： | 28/28页 |
| 文件大小： | 305K |
| 代理商： | W33D2031 |
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W33D0001 SERIES
Publication Release Date: July 1999
- 9 -
Revision A3
1.4.1 Using the transceiver function of
P to program the clock data
Programming the clock data through the transceiver function of the
P is similar to programming in
normal mode. Unlike normal mode, the programming addresses use the 192
227 range.
When the MS pin is high and the clock bit is zero, the clock can be programmed by the
P. When the
clock setting is adjusted by the
P, the clock function is stopped. After the clock's data is set, the
clock time resets using the new data setting.
However, the clock will not stop while the
P is reading the clock data. In clock mode, the P can
read or write the clock data with the addressing function. 192 is the starting address of clock mode.
Moreover, the digit is displayed by means of an internal decoder in clock mode. Therefore, it needs
only 4 bits to store a digit. The address of the digit corresponding to Month is 192
199. The address
range for Date is 200
207.
The
P only reads or writes clock data in 24-hour format, however, the W33D0001 will automatically
display the clock time in 12-hour format if the 12 / 24 pin is set high. The "P" symbol in the LCD
panel is not programmed through the
P. The appearance of the "P" symbol depends on the data in
the Hour reg. (address = 208
215).
The data in the 224
227 address indicate the leap-year. When the dot beside the symbol "P" is
lighted, the data in the 224
227 will be (0000) in the leap-year. The data (0001) means the 1st year
after the leap-year and the data (0010) means the 2nd year after the leap-year and so on.
Refer to Figure 1, and the address mapping show in table 2.
Any data not listed on Table 2 cannot be programmed in the clock mode. During programming
(writing) of the data in clock mode, the clock is stopped. It is restarted when the read clock is input to
the RCLK pin (or a dummy read is performed). This means that the built-in clock starts to work after
the write function of the clock mode has ended.
The built-in clock will not stop when clock mode data is being read.
1.4.2 Manual adjusting method through the MODE and SET pins.
When clock mode is entered, the current time is displayed. Keeping the MODE pin depressed will
cause the month digits to begin to flash. The SET pin can used to adjust the month setting; the setting
will increase by one with each trigger. When the MODE pin is released, the month digits will continue
the flash. At this time, a new input on the MODE pin will cause the date digits to begin flashing, and
the date can be set.
Successive inputs on the MODE pin will cause the hour, minute, and leap-year digits to flash,
allowing the hour, minute, and leap-year to be adjusted. While the leap-year digits are flashing, a
trigger on the MODE pin will return the system to clock mode. If there is no signal on the MODE pin
for more than 15 seconds (or 30 seconds, by mask option), it will return to clock mode automatically.
If the SET pin is depressed and held down for over 2 seconds, the clock setting will speed the
P at
an interval of 125 mS.
When the SET pin is depressed during the clock adjusting mode, the clock will be restarted from the
new data setting. The clock mode will automatically return to normal status from flash status if the
flash status flashes for over 15 sec and no key is depressed.
The MODE and SET pins are both high active. Refer to Figure 7.
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