Toshiba – Toshiba TMP87CP24AF User Manual
Page 103
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TOSHIBA
TMP87CM24A/P24A
The phenomena (2) occurs underthe condition.
Once the power supply voltage (Vdd) falls down below 2.2 V and comes back above 2.2 V for its operation.
(please refer Figure 2-57)
The Voltage Regulator for LCD Driver will require a few time (e.g. max 1 s/atTopr = - 10 °C) for its warm
up. Then all pattern can not appear on LCD module for a few time.
Please enable the LCD control bit (EDSP which is bit 7 of LCDCR) to "1" after waiting for the enough
warm up time (Maximum 1 s/Topr = -10 X).
Specification of the phenomena (2)
Topr= -10 to 70 °C
SYMBOL
ITEM (Conditions)
Min
Typ.
Max
Unit
Cl)
Warm Up Time of VI
-
0.1
1
s
C2)
Warm Up Time of VI
(at initial power on)
0.1
d)
Warm Up Time of (V2 and V3)
at fc =
8
MHz, Boost frequency = fc/2^3
40
ms
at fc =
8
MHz, Boost frequency = fc/2”
-
10
-
at fc =
8
MHz, Boost frequency = fc/2^°
-
5
-
at fc =
8
MHz, Boost frequency = fc/2^
-
2.5
-
at fc = 4MHz, Boost frequency = fc/2^^
-
80
-
ms
at fc = 4MHz, Boost frequency = fc/2"
-
20
-
at fc = 4MHz, Boost frequency = fc/2^°
-
10
-
at fc = 4MHz, Boost frequency = fc/2^
-
5
-
at fc = 2MHz, Boost frequency = fc/2^^
-
160
-
ms
at fc = 2MHz, Boost frequency = fc/2"
-
40
-
at fc = 2MHz, Boost frequency = fc/2^°
-
20
-
at fc = 2MHz, Boost frequency = fc/2^
-
10
-
Note 1: Typical value show those at Торг = 25°C
Note 2:
Common condition for above Cl), C2), d) : 0.1
^ C ^ 0.47 juf
3
-
24-103
2002
-
10-03