LF3312 datasheet(21/33 Pages) LODEV

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Configuration Register Definitions

DEVICES INCORPORATED

LF3312

12-Mbit Frame Buffer / FIFO

Preliminary Datasheet

LOGIC Devices Incorporated

August 8, 2006 LDS.3312 O

Video Imaging Product

disable TRS sync detection (dflt)

F-bit of embedded TRS EAV marks current write pointer.

F-bit of embedded TRS EAV sets current write pointer to value

set by BOUT/BIN or ALAT (1-chnl.modes) or ALAT & BLAT (2-chnl.

modes, respectively).

F-bit of embedded TRS EAV clears current write pointer.

- If B_FLD = 0 (frame-based sync), action is on each B-channel

EAV with F = 0 for which the preceding EAV had F = 1.

- If B_FLD = 1 (field-based sync), action is on each B-chan EAV

whose F differs from that of the preceding EAV. A_FLD affects

the tA-channel operation in the same fashion.

use only falling F-bit in EAV; ignore rising (dflt)

use both rising and falling F-bit in EAV

use only falling F-bit in EAV; ignore rising (dflt)

use both rising and falling F-bit in EAV

effect of bringing RSET low on the read pointer(s). When RSET goes to 0:

force read pointer(s) to marked address(es) (dflt)

force read pointer(s) as shown in following table:

OPMODE BCLR

Read Pointer Equals:

0-3

BIN/BOUT address

0-3

BLAT address

4-7

Ch. A=ALAT, Ch. B=BLAT

LF3312 Datasheet(PDF) 21 Page - LOGIC Devices Incorporated