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SAF7113H Datasheet PDF : 75 Pages
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Philips Semiconductors
SAF7113H
9-bit video input processor
Table 3:
Symbol
CE
VSSA2
VDDA2
AI21
AI2D
Pin description…continued
Pin
Type Description
40
I
chip enable, Sleep mode with low power consumption if connected to
ground (internal pull-up); internal reset sequence is generated when
released
41
P
ground for analog supply voltage channel 2
42
P
positive supply voltage for analog channel 2 (3.3 V)
43
I
analog input 21
44
I
differential analog input for AI21 and AI22; has to be connected to
ground via a capacitor; see application diagram of Figure 40
[1] For board design without boundary scan implementation connect the TRST pin to ground.
[2] This pin provides easy initialization of the Boundary Scan Test (BST) circuit. TRST can be used to force the
Test Access Port (TAP) controller to the TEST_LOGIC_RESET state (normal operation) at once.
[3] In accordance with the IEEE1149.1 standard the pads TCK, TDI, TMS and TRST are input pads with an
internal pull-up transistor and TDO is a 3-state output pad.
8. Functional description
8.1 Analog input processing
The SAF7113H offers four analog signal inputs, two analog main channels with source
switch, clamp circuit, analog amplifier, anti-alias filter and video 9-bit CMOS ADC
(see Figure 6).
8.2 Analog control circuits
The anti-alias filters are adapted to the line-locked clock frequency via a filter control
circuit. The characteristics are shown in Figure 3. During the vertical blanking period, gain
and clamping control are frozen.
6
V
(dB)
0
−6
mgd138
−12
−18
−24
−30
−36
−42
0
2
4
6
8
10
12
14
f (MHz)
Fig 3. Anti-alias filter
9397 750 14231
Product data sheet
Rev. 03 — 9 May 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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