參數(shù)資料
型號(hào)： SPLC782A
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(dòng)器
文件頁(yè)數(shù)： 18/40頁(yè)
文件大小： 1670K
代理商： SPLC782A
SPLC782A
5.14. Interfacing to MPU
Sunplus Technology Co., Ltd.
Proprietary & Confidential
18
FEB. 15, 2005
Version: 1.7
There are two types of data operations: 4-bit operation and 8-bit
operation. Using 4-bit MPU, the interfacing 4-bit data is
transferred by 4 bus lines (for 8-bit operation, DB7 to DB4). The
bus lines of DB0 - DB3 are not used. Using 4-bit MPU to
interface 8-bit data needs two times. 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 bus lines (for
8-bit operation, DB3 to DB0). Using 8-bit MPU, the interfacing
8-bit data is transferred by 8 bus lines (DB0 - 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
Figure 5-27:
Example of 4-bit Data Transfer Timing Sequence
SunpusConidenia
Fo PARTMNERUseOny
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