saa6712e NXP Semiconductors, saa6712e Datasheet - Page 54

• Manufacturer Part Number: saa6712e
• Description: Xga Rgb To Tft Graphics Engine
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.12.3
The SAA6712E supports three timing reference signals to
drive the panels: PVS (vertical synchronization pulse),
PHS (horizontal synchronization pulse) and PDE (data
qualifier). The polarity of these signals is programmable.
To program high polarity the three programming registers
(vsync_pol, hsync_pol, de_pol) must be set to logic 1.
Sometimes panels require that no data qualifier signals
must be active during vertical synchronization.
The generation of PDE pulses during active PVS can be
switched off by de-asserting sync_de_inact.
9
In accordance with the Absolute Maximum Rating System (IEC 134); all ground pins are connected together and all
supply pins are connected together.
Note
1. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 k resistor.
1999 Aug 25
V
V
V
T
T
T
V
SYMBOL
V
stg
amb
amb(bias)
DDD
DD(PLL)
n
es
XGA RGB to TFT graphics engine
SS
LIMITING VALUES
T
IMING REFERENCE SIGNALS
digital supply voltage
PLL supply voltage
voltage at digital inputs and outputs
voltage at digital output
voltage difference between V
storage temperature
ambient temperature
operating bias ambient temperature
electrostatic handling voltage for all pins
PARAMETER
SS(PLL)
and V
SS(D)
54
The position and length of the horizontal synchronization
pulses in an output line must be programmed with
h_hs_start and h_hs_end. The vertical synchronization
pulse starts at line 0 and ends at v_vs_end. The horizontal
start offset in line 0 can be set-up with h_vs_start and the
horizontal end offset with h_vs_end.
The data qualifier PDE frames the display region that
should be visible on the panel horizontally. It will be
asserted at h_de_start and it will be de-asserted at
h_de_end. It frames both horizontal border and active
video region.
outputs in 3-state
outputs active
note 1
CONDITIONS
0
0.5
0.5
0.5
0.5
65
10
2
MIN.
+4.6
+4.6
+5.5
V
100
+150
70
+70
+2
Preliminary specification
DDD
MAX.
SAA6712E
+ 0.5 V
V
V
V
mV
kV
C
C
C
UNIT