SM5837AF Datasheet, PDF (6/8 Pages) Nippon Precision Circuits Inc – Variable-length 1H Delay Line LSI

SM5837AF
t OEH
OE
t PZH
Hi-Z
DO0 - 11
t PZL
Hi-Z
t OEL
t PHZ
t PLZ
0.5V
0.5V
1.5V
1.5V
1.5V
SICK
SDI
LEN
t CL2
t CP2
t CH2
t S2
t H2
t CE
t EC
1.5V
1.5V
1.5V
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 (L_H) 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 (L_H) is deter-
mined by the input data on DL0 to DL10 as shown in
equation 1 and table 1.
10
L_H = 31 + _∑ {DLk × 2^k}
(1)
k=0
Table 1. Delay bit length setting
DL10 DL9
DL8
DL7
DL6
DL5
DL4
DL3
DL2
DL1
DL0
Delay length
0
0
0
0
0
0
0
0
0
0
0
31
0
0
0
0
0
0
0
0
0
0
1
32
0
0
0
0
0
0
0
0
0
1
0
33
0
0
0
0
0
0
0
0
0
1
1
34
0
0
0
0
0
0
0
0
1
0
0
35
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
↓
0
0
1
1
1
1
0
0
0
0
1
512
NIPPON PRECISION CIRCUITS—6