Sharp LM161 Series - Power Conditions for Internal Reset

If the above conditions are not satisfied, the inter-
nal reset circuit will not operate normally. In such a
case, the LCD unit must be initialized by executing
a series of instructions (see the Execution by In-
structions section).
t
AS
PW
EH
t
DDR
t
cycE
t
AH
t
AH
V
OH
V
OL
DB
0
- DB
7
t
Ef
t
DHR
t
Er
V
IH
V
IL
E
V
IH
R/W
V
IH
V
IL
RS
VALID DATA
LCD27-25
Figure 6. Read Operation Timing Diagram
(For data sent from the LCD unit to the external microprocessor)
3$5$0(7(5 6<0%2/
9$/8(
81,7
0,1 0$;
(QDEOH &\FOH 7LPH W
F\F
(

QV
(QDEOH 3XOVH :LGWK +LJK /HYHO 3:
(+


QV
(QDEOH 5LVH)DOO 7LPH W
(U
W
(I

 QV
6HWXS 7 LPH 56 5:( W
$6


QV
$GGUHVV +ROG 7LPH W
$+


QV
'DWD 'HOD\ 7LPH W
''5

 QV
'DWD +ROG 7LPH W
2+5


QV
Table 10. Read Operation Timing Characteristics
(V
DD
= 5.0
±
5%, V
SS
= 0 V, Ta = 0 ~ 50
°
C)
3$5$0(7(5 6<0%2/
9$/8(
81,7
0,1 7<3 0$;
9 ROWDJH %XLOG8S 7LPH W
UFF


 PV
3RZHU2II 3HULRG W
2))


PV
Table 11. Power Conditions for Internal Reset
0.1 ms ≤ t
rCC
≤
10 ms
t
OFF
≥ 1 ms
0.2 V0.2 V0.2 V
4.5 V
NOTE: * t
OFF
indicates Power-off Period.
V
DD
LCD27-26
Figure 7.
Dot-Matrix LCD Units
20 Display Unit User’s Manual