參數(shù)資料
型號(hào): ML9040-Axx
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: DOT MATRIX LCD CONTROLLER WITH 16-DOT COMMON DRIVER AND 40-DOT SEGMENT DRIVER
中文描述: 點(diǎn)陣LCD控制器的16交通部通用驅(qū)動(dòng)器和40段驅(qū)動(dòng)交通部
文件頁(yè)數(shù): 25/47頁(yè)
文件大小: 434K
代理商: ML9040-AXX
ML9040-Axx/-Bxx
Semiconductor
25
Data Bus Connected with CPU
The data bus connected with CPU is available either once for 8 bits or twice for 4 bits. This
allows the ML9040-Axx/-Bxx to be interfaced with either an 8-bit or 4-bit CPU.
(1) When the interface data bus is 8 bits
Data bus DB
0
to DB
7
(8 lines) are all used and data input/output is carried out in one
step.
(2) When the interface data bus is 4 bits
The 8-bit data input/output is carried out in two steps by using only high-order 4 bits
of data bus DB
4
to DB
7
(4 lines)
The first time data input/output is made for 4-high order bits (DB
4
to DB
7
) and the
second time data input/output is made for low-order 4 bits (DB
0
to DB
3
). Even when
the data input/output can be completed through high-order 4 bits, be sure to make
another input/output of low-order 4 bits.
(Example: Busy flag Read).
Since the data input/output is carried out in two steps as one execution, no normal data
transfer is executed from the next input/output if accessed only once.
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