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UPD7225 数据表(PDF) 21 Page - NEC

部件名 UPD7225
功能描述  PROGRAMMABLE LCD CONTROLLER/DRIVER
PDF  52 Pages
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制造商  NEC [NEC]
网页  http://www.nec.com/
标志 NEC - NEC

UPD7225 数据表(HTML) 21 Page - NEC

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Data Sheet S14308EJ6V0DS00
21
µµµµPD7225
5.
CLOCK CIRCUIT
The clock oscillator can be configured by connecting a resistor (R) across the CL1 and CL2 clock pins. When
using the external clock, CL1 can be used to input the external clock (CL2: Open).
Figure 5-1. External Circuit for Clock Oscillation Pins
OSC
CL1
R
CL2
fCL
To LCD timing
control
PD7225
µ
OSC
CL1
External clock
Open
CL2
fCL
To LCD timing
control
PD7225
µ
Remark
fCL = Clock oscillation frequency (when using the external clock, this frequency is same as that of the
external clock frequency.)
When configuring a multi-chip system using the /SYNC pin, a clock with the same frequency and same phase
must be supplied to the CL1 pin of each
µPD7225.



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