參數(shù)資料
型號(hào)： HCD44780UA00
廠商： Hitachi,Ltd.
英文描述： 320 x 240 pixel format, CFL backlight available with power harness
中文描述： 點(diǎn)陣式液晶顯示控制器/驅(qū)動(dòng)器
文件頁數(shù)： 49/59頁
文件大?。?/td> 316K
代理商： HCD44780UA00
HD44780U
49
AC Characteristics (V
CC
= 2.7 to 4.5 V, T
a
= –30 to +75
°
C*
3
)
Clock Characteristics
Item
Symbol Min
Typ
Max
Unit
Test Condition Note*
External
clock
operation
External clock frequency
f
cp
Duty
125
250
350
kHz
11
External clock duty
45
50
55
%
External clock rise time
t
rcp
t
fcp
—
—
0.2
μ
s
μ
s
External clock fall time
—
—
0.2
R
oscillation
Note:
Clock oscillation frequency f
OSC
190
270
350
kHz
R
f
= 75 k
,
V
CC
= 3 V
12
*
Refer to the Electrical Characteristics Notes section following these tables.
Bus Timing Characteristics
Write Operation
Item
Symbol
Min
Typ
Max
Unit
Test Condition
Enable cycle time
t
cycE
PW
EH
t
Er
, t
Ef
t
AS
t
AH
t
DSW
t
H
1000
—
—
ns
Figure 25
Enable pulse width (high level)
450
—
—
Enable rise/fall time
Address set-up time (RS, R/
W
to E)
—
—
25
60
—
—
Address hold time
20
—
—
Data set-up time
195
—
—
Data hold time
10
—
—
Read Operation
Item
Symbol
Min
Typ
Max
Unit
Test Condition
Enable cycle time
t
cycE
PW
EH
t
Er
, t
Ef
t
AS
t
AH
t
DDR
t
DHR
1000
—
—
ns
Figure 26
Enable pulse width (high level)
450
—
—
Enable rise/fall time
Address set-up time (RS, R/
W
to E)
—
—
25
60
—
—
Address hold time
20
—
—
Data delay time
—
—
360
Data hold time
5
—
—
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