pcf8831 NXP Semiconductors, pcf8831 Datasheet - Page 13

• Manufacturer Part Number: pcf8831
• Description: Stn Rgb - 160 Output Row Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.1
When the PCF8831 is powering-up or powering-down, the various supply voltages and some interface signals have to
be applied in a certain sequence.
Table 2 Power-up and power-down sequences
T
Notes
1. With no V
2. When no V
3. When ROWRES2 is active (at V
2002 Aug 14
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
amb
d(VDD-VH)
d(VDD-VMH)
d(VDD-VL)
d(VH-VDD)
d(VMH-VDD)
d(VL-VDD)
PU(VH-SVM)
PU(VMH-SVM)
PU(VL-SVM)
rel(RES1-SVM)
rel(RES1)
rel(RES2)
PD(VH)
PD(VMH)
PD(VL)
SYMBOL
STN RGB - 160 output row driver
= 40 to +85 C; refer to Figs 7 and 8.
Power-up and power-down sequences
H
L
delay V
delay V
delay V
delay V
delay V
delay V
power-up time V
power-up time V
power-up time V
ROWRES1 release time to SVM inactive
ROWRES1 release time
ROWRES2 release time
power-down time from SVM active to V
power-down time from SVM active to V
power-down time from SVM active to V
or V
is supplied, pad V
MH
DD(on)
DD(on)
DD(on)
H(off)
MH(off)
L(off)
supply, both pads V
to V
to V
to V
to V
to V
to V
PARAMETER
DD(off)
DD(off)
H(on)
MH(on)
L(on)
H(on)
MH(on)
L(on)
DD(off)
L
to SVM inactive
is clamped to V
SS
to SVM inactive
to SVM inactive
), the level not-selected goes to V
H
and V
MH
SS
are clamped by separate internal diodes to V
H(off)
MH(off)
L(off)
by a separate internal diode, see Fig.10.
13
note 1
note 1
note 2
note 1
note 1
note 2
SVM falls to V
SVM falls to V
SVM falls to V
release ROWRES1 before making
SVM inactive
allow at least one rising RCLK edge
before releasing ROWRES1
define V
inactive; note 3
M
SS
when ROWRES2 is
CONDITIONS
and pad V
SS
SS
SS
M
can be disconnected.
Preliminary specification
DD
0
0
0
0
0
0
0
0
0
0
50
0
0
0
0
, see Fig.10.
MIN.
PCF8831
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
UNIT