參數(shù)資料
型號: UPD16663N
廠商: NEC Corp.
英文描述: 240-OUTPUT LCD COLUMN SEGMENT DRIVER WITH BUILT-IN RAM
中文描述: 240輸出LCD列段驅(qū)動,配有內(nèi)存
文件頁數(shù): 17/40頁
文件大?。?/td> 289K
代理商: UPD16663N
Data Sheet S13392EJ1V0DS00
17
μ
PD16663
7. CPU INTERFACE
7.1 RDY (Ready) Pin Functions
Single port RAM is used as the on-chip RAM in the
μ
PD16663. The RDY pin is used to make the CPU wait, in
order to prevent contention between a CPU access and a read on the LCD side.
7.1.1 Timing
Hi-z
Hi-z
Wait
Ready
A
0
to
A
16
,/UBE
/CS
/OE,/WE
RDY
Wait
7.1.2 RDY pin connection
The RDY pin uses a 3-state buffer. Connect an external pull-up resistor to the RDY pin. When more than one
μ
PD16663 LSI is being used, use a wired-OR connection for the RDY pin of each LSI.
CPU
Ready input
Pull-up resistor
RDY
Column driver
RDY
Column driver
V
CC2
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