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參數資料
| 型號： | LG128643-SMLYH6V |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | LCD Module |
| 中文描述： | 液晶顯示模塊 |
| 文件頁數： | 8/20頁 |
| 文件大?。?/td> | 156K |
| 代理商： | LG128643-SMLYH6V |
LG128643-SMLYH6V - 8 -
E
R/W
RS
Output
Register
Address
DB0~DB7
N
N+1
N+2
Data at address N
Data at address N+1
Busy
check
address N
Write
Read data
(dumy)
Busy
check
Read data
address N
Busy
check
Read data
address N+1
Busy
check
MPU Read Timing
4.3 Reset
The system can be initialized by setting /RST terminal at low level when turning power on.
When /RST becomes low, following procedure is occurred.
1. Display off
2. Display start line register is set by 0. (Z-address 0)
While /RST is low level, no instruction except status read can be accepted. Reset status
appears at DB4 of status byte, after DB4 becomes
“
L
”
, any instruction can be accepted.
The conditions of power supply at initial power up are shown below.
Item
Symbol
Min.
Typ.
Reset time
t
RS
1.0
--
Rise time
t
R
--
--
Max.
--
200
Unit
μ
s
ns
t
t
RS
R
0.3V
0.7V
V
DD
DD
DD
/RST
4.5V
4.4 Busy Flag
Busy flag indicates the system is now internally operating or not. When busy flag is
“
H
”
,
the system is in internal operation. When busy flag is
“
L
”
, the system can accept data or
instruction. Busy flag is read out on DB7 by the Status Read instruction.
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