SM5837AF datasheet(7/10 Pages) NPC

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SM5837AF

SEIKO NPC CORPORATION —7

FUNCTIONAL DESCRIPTION

The SM5837AF provides a built-in 1H delay for video signal processing. The delay can be set to a length of 31

to 2078 clock delay bits. The delay length (LH) can be set using 2 methods, selected by the state of PARA.

When PARA is HIGH, the delay length is set by parallel input data on DL0 to DL10. When PARA is LOW, the

delay length is set by serial input data using SDI, SICK and LEN. Accordingly, the function of DL0/SDI,

DL1/SICK and DL2/LEN is determined by PARA.

Parallel Input Set Method (PARA, DL0 to DL10)

When PARA is HIGH, parallel input data is used to set the delay length. The delay length (LH) is determined

by the input data on DL0 to DL10 as shown in equation 1 and table 1.

Table 1. Delay bit length setting

DL10

DL9

DL8

DL7

DL6

DL5

DL4

DL3

DL2

DL1

DL0

Delay length

00000000000

00000000001

00000000010

00000000011

00000000100

↓↓↓↓↓↓↓↓↓↓↓

↓

00111100001

512

00111100010

513

↓↓↓↓↓↓↓↓↓↓↓

↓

01111100001

1024

01111100010

1025

↓↓↓↓↓↓↓↓↓↓↓

↓

11111100001

2048

11111100010

2049

↓↓↓↓↓↓↓↓↓↓↓

↓

11111111110

2077

11111111111

2078

LH = 31 +

(1)

{DLk

× 2 }

k = 0

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