參數(shù)資料
型號: 935211970551
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝: PLASTIC, SOT-393, QFP-64
文件頁數(shù): 24/67頁
文件大?。?/td> 443K
代理商: 935211970551
1998 May 15
30
Philips Semiconductors
Product specication
Video Input Processor (VIP)
SAA7111
Table 2
Digital output control
Notes
1. OFTS(1 : 0) = 10 or 01 or 00.
2. OFTS(1 : 0) = 11.
13 CLOCK SYSTEM
13.1
Clock generation circuit
The internal CGC generates the system clocks LLC, LLC2
and the clock reference signal CREF. The internal
generated LFCO (triangular waveform) is multiplied by
2 or 4 via the analog PLL (including phase detector, loop
filter, VCO and frequency divider). The rectangular output
signals have a 50% duty factor.
OEYC
FEI
VPO
15 to 0(1)
15 to 8(2)
7to0(2)
00
Z
1
0
active
Z
01
Z
1
Z
active
Z
Table 3
Clock frequencies
CLOCK
FREQUENCY (MHz)
XTAL
24.576
LLC
27
LLC2
13.5
LLC4
6.75
LLC8
3.375
Fig.22 Block diagram of clock generation circuit.
handbook, full pagewidth
BAND PASS
FC = LLC/4
ZERO
CROSS
DETECTION
PHASE
DETECTION
LOOP
FILTER
DIVIDER
1/2
DIVIDER
1/2
OSCILLATOR
DELAY
CREF
MGC632
LLC2
LLC
LFCO
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