LC7454A/M
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Operation on each mode
The LC7454 has three operating modes. The operation mode be selected by the status of MOD0 and MOD1 terminals. The functionality of
three modes are the same. Only the PLL reference frequency which is used to generate operation clock is different. Use mode1 or mode3
only in the application which uses 2x data. Any mode (Mode1,2 or 3) can be used in the 1x data only application.
Terminal
MOD1
MOD0
Open
Open
Mode1
NTSC-VCR
Use H-sync signal which is separated from C-Video signal.
Open
VDD1
Mode2
NTSC-VCR
Use 1/32 divided signal 503 KHz which is generated by external
ceramic resonator.
VDD
Open
Mode3
NTSC-TV
Use H-sync signal from Fly Back.
MODE Applications
PLL reference
Terminal Functions
Terminal #
(DIP18)
Function Description
Mode 2
Terminal
name
Mode 1
Mode 3
1
2
3
4
VSS1
TEST
LN26
Ground
Test terminal, Open in normal operation
32
μ
s Pulse output at line 26 timing on both field
O/ E /CFOUT Pulse output for field
judgment
HS
/CFIN
Sync separated
HS
pulse
output
DATA
Line select data input and slice data output
SCKIN
Data transmit clock input
CE
Chip select input
IOC
Data direction control signal input
SLICE
Pulse output at selected slice line
VDD1
Power terminal
MOD0
Open
CVIN
Conposit video input
VCOR
Connect resister for internal VCO oscillation frequency control
MOD1
Open
VDD2
Power terminal
VSS2
Ground
CP
Filter terminal for internal PLL
*1 ‘H’ level in Odd field, ‘L’ level in Even field.
*2 N-ch open drain in output mode.
*3 Feed ‘L’ level only when data transmission is in effect. If CE=’H’, data terminal will become
input/output disable, SCKIN terminal will become input disable.
*4 ‘H’ level : Output mode
‘L’ level : Input mode
*1
Output terminal for ceramic
resonator
Input terminal for Ceramic
resonator
Pulse output for field
judgment
External
HS
pulse input
*1
5
6
7
8
9
10
11
12
13
14
15
16
17
18
*2
*3
*4
Connect to VDD
Open
Open
Connect to VDD