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參數(shù)資料
| 型號： | HT16270 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | RAM Mapping 64 x16 LCD Controller for I/O C |
| 中文描述： | 內(nèi)存映射64 x16 LCD控制器的I /業(yè)主立案法團 |
| 文件頁數(shù)： | 9/17頁 |
| 文件大?。?/td> | 151K |
| 代理商： | HT16270 |
HT1627
9
April 21, 2000
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Timer and WDT configurations
If an external clock is selected as the source of
system frequency, the SYS DIS command turns
out invalid and the power down mode fails to be
carried out until the external clock source is re-
moved.
Buzzer tone output
A simple tone generator is implemented in the
HT1627. The tone generator can output a pair
of differential driving signals on the BZ and BZ
which are used to generate a single tone.
Command format
The HT1627 can be configured by the software
setting. There are two mode commands to con-
figure the HT1627 resource and to transfer the
LCD display data.
The following are the data mode ID and the
command mode ID:
Operation
Mode
ID
READ
Data
1 1 0
WRITE
Data
1 0 1
READ-MODIFY-WRITE
Data
1 0 1
COMMAND
Command 1 0 0
If successive commands have been issued, the
command mode ID can be omitted. While the
system is operating in the non-successive com-
mand or the non-successive address data mode,
the CS pin should be set to 1 and the previous
operation mode will be reset also. The CS pin
returns to 0 , a new operation mode ID should
be issued first.
Name
Command Code
Function
TONE OFF
0000-1000-X
Turn-off tone output
TONE 4K
010X-XXXX-X
Turn-on tone output, tone frequency is 4kHz
TONE 2K
0110-XXXX-X
Turn-on tone output, tone frequency is 2kHz
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