參數(shù)資料
型號(hào): ML9044
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: DOT MATRIX LCD CONTROLLER DRIVER
中文描述: 點(diǎn)陣LCD控制器驅(qū)動(dòng)
文件頁(yè)數(shù): 29/55頁(yè)
文件大?。?/td> 538K
代理商: ML9044
Semiconductor
ML9044
29/54
I/F with CPU
Parallel interface mode
The ML9044 can transfer either 8 bits once or 4 bits twice on the data bus for interfacing with any
8–bit or 4–bit microcontroller (CPU).
1) 8–bit interface data length
The ML9044 uses all of the 8 data bus lines DB0 to DB7 at a time to transfer data to and from the
CPU.
2) 4–bit interface data length
The ML9044 uses only the higher–order 4 data bus lines DB
4
to DB
7
twice to transfer 8–bit data
to and from the CPU.
The ML9044 first transfers the higher–order 4 bits of 8–bit data (DB
4
to DB
7
in the case of 8–bit
interface data length) and then the lower–order 4 bits of the data (DB
0
to DB
3
in the case of 8–bit
interface data length).
The lower–order 4 bits of data should always be transferred even when only the transfer of the
higher–order 4 bits of data is required. (Example: Reading the Busy Flag)
Two transfers of 4 bits of data complete the transfer of a set of 8–bit data. Therefore, when only
one access is made, the following data transfer cannot be completed properly.
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