參數(shù)資料
型號: SAF7118H
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Multistandard video decoder with adaptive comb filter and component video input
封裝: SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;SAF7118EH/V1<SOT807-1 (HBGA156)|<<http://www.nxp.com/packages/SOT807-1.html<1<,;
文件頁數(shù): 33/175頁
文件大小: 898K
代理商: SAF7118H
SAF7118_4
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 4 July 2008
33 of 175
NXP Semiconductors
SAF7118
Multistandard video decoder with adaptive comb filter
8.1.5
Power-on reset and CE input
A missing clock, insufficient digital or analog V
DDA0
supply voltages (below 2.8 V) will start
the reset sequence; all outputs are forced to 3-state (see
Figure 22
). The indicator output
RES is LOW for approximately 128 LLC after the internal reset and can be applied to reset
other circuits of the digital TV system.
It is possible to force a reset by pulling the CE input to ground. After the rising edge of CE
and sufficient power supply voltage, the outputs LLC, LLC2 and SDA return from 3-state
to active, while the other signals have to be activated via programming.
Table 6.
Clock
XTALO
LLC
LLC2
LLC4 (internal)
LLC8 (virtual)
Decoder clock frequencies
Frequency (MHz)
24.576 or 32.110
27
13.5
6.75
3.375
Fig 21. Block diagram of the clock generation circuit
BAND-PASS
FC = LLC / 4
ZERO
CROSS
DETECTION
PHASE
DETECTION
LOOP
FILTER
DIVIDER
1 / 2
DIVIDER
1 / 2
OSCILLATOR
mhb330
LLC2
LLC
LFCO
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