SAA7146AH NXP Semiconductors, SAA7146AH Datasheet - Page 55

• Manufacturer Part Number: SAA7146AH
• Manufacturer: NXP Semiconductors

Specifications of SAA7146AH

• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
Table 53 Field interval definitions for D1 (CCIR 656) SAV and EAV codes; note 1
Note
1. Signals F and V change state synchronously with the end of active video timing reference code at the beginning of
7.8.6.1
Field detection modes:
2004 Aug 25
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V-digital field blanking
Field 1; start (V = 1)
Field 1; finish (V = 0)
Field 2; start (V = 1)
Field 2; finish (V = 0)
F-digital field identification
Field 1; F = 0
Field 2; F = 1
Direct mode: FLD signal detected from incoming H/V signals, for timing behaviour see Figs. 11 and 12.
Forced toggle: FLD signal regularly synchronized to source, but will never stay more than two fields with the same ID.
The circuit expects to detect a field change with every vertical reference edge, if the field does not change (field error),
the circuit change the field ID automatically. If the circuit switch to the wrong sequence i. e. at the beginning of
processing, it will be synchronized after one second where no field error has occurred.
Free toggle: FLD signal toggles with every vertical reference edge, independent of source FID.
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
the digital line.
FLD-DMSD
V-DMSD
FLD
LLC
Field detection control
HS
VS
DEFINITION
Fig.11 Timing of field detection EVEN-to-ODD for direct mode.
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Product specification
SAA7146A
MHB053