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參數(shù)資料
| 型號： | SPLC780D |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16COM/40SEG Controller/Driver |
| 中文描述： | 16COM/40SEG控制器/驅(qū)動器 |
| 文件頁數(shù)： | 18/48頁 |
| 文件大小： | 851K |
| 代理商： | SPLC780D |
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SPLC780D
6.14. Interfacing to MPU
Sunplus Technology Co., Ltd.
Proprietary & Confidential
18
NOV. 04, 2004
Version: 1.2
There are two types of data operations: 4-bit and 8-bit operations.
Using 4-bit MPU, the interfacing 4-bit data is transferred by
4-busline (DB4 to DB7). Thus, DB0 to DB3 bus lines are not
used. Using 4-bit MPU to interface 8-bit data requires two times
transferring. First, the higher 4-bit data is transferred by
4-busline (for 8-bit operation, DB7 to DB4). Secondly, the lower
4-bit data is transferred by 4-busline (for 8-bit operation, DB3 to
DB0). For 8-bit MPU, the 8-bit data is transferred by 8-buslines
(DB0 to DB7).
IR7
IR3
Busy
AC3
Not
busy
AC3
D7
D3
IR6
IR2
AC6
AC2
AC6
AC2
D6
D2
IR5
IR1
AC5
AC1
AC5
AC1
D5
D1
IR4
IR0
AC4
AC0
AC4
AC0
D4
D0
Instruction
Write
Busy flag
check
Busy flag
check
Data
Write
RS
E
Internal
operation
DB7
R/W
DB6
DB5
DB4
Functioning
Example of 4-bit Data Transfer Timing Sequence
SunpusConidenia
Fo PARTMNERUseOny
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