參數(shù)資料
型號: UPD6461GS
廠商: NEC Corp.
英文描述: CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY 12 ROWS x 24 COLUMNS
中文描述: 大規(guī)模集成電路芯片的CMOS攝像機(jī)屏幕字符顯示12行x 24個欄目
文件頁數(shù): 52/60頁
文件大?。?/td> 411K
代理商: UPD6461GS
52
μ
PD6461, 6462
POWER-ON CLEAR SPECIFICATIONS
V
DD
t
PCLL
0 V
V
DD
0 V
V
DD
0.8 V
DD
0.16 V
DD
PCL
EXTERNAL CLOCK INPUT
Timing for external clock input (valid when selected with mask option)
Note
10% of the external clock cycle
Example: When the external clock frequency is 8 MHz
Clock cycle = 125 ns
The maximum slew rate is 10% of 125 ns, giving 12.5 ns.
Remarks 1.
Keep the external clock in phase with the rising edges of Hsync.
2.
Design the input of Hsync so that noise of more than 100 ns is suppressed.
3.
When using an external clock, leave the OSC
OUT
pin open.
Parameter
PCL pin low level hold time
Conditions
Min.
10
Typ.
Max.
Unit
μ
s
Symbol
t
PCLL
Parameter
Time from external clock fall to synchro-
nizing signal rise
Time from synchronizing signal rise to
external clock fall
t
S
(rising slew rate)
Conditions
Min.
30
30
Typ.
Max.
Unit
ns
ns
ns
Symbol
t
C-H
t
H-C
t
S
Note
t
C-H
t
H-C
50 %
50 %
Hsync
External
clock
10 %
t
S
90 %
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