Waveforms Of Major Check Point; Crystal; Flash Memory - LG SNC4R Service Manual

WAVEFORMS OF MAJOR CHECK POINT

1. CRYSTAL

1
FIG 1. X500 (27 MHz)
X500
4 FLOAT
1 IN/OUT
C518
10pF
DGND
R556 0
27MHz
3 R557 100
IN/OUT
2
FLOAT
C517
1
10pF

2. FLASH MEMORY

VCC
2
CS#
3
CLK
4
DO
5
FIG 2. VCC, CS#, CLK, DO
3
R552
SF_CS
0 OHM(1)
R559
NC
0 OHM(1)
3-26
Copyright © 2021 LG Electronics Inc. All rights reserved.
2
R536 R537 R538
PZ1608U221-1R4TF
10K 10K
10K
IC504
5
1 8
VCC
CS#
2 7
HOLD#
SO
DGND
3 6
SCLK
WP#
4 5
SI
VSS
For DSP(2MB)
DGND
Only for training and service purposes.
3.3VA
FB504
C550
100nF
4