LG SN4A - Crystal; Flash Memory; Waveforms of Major Check Point

3-27
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Only for training and service purposes.
WAVEFORMS OF MAJOR CHECK POINT
1. CRYSTAL
FIG 1-1. X501 (27 MHz)
1
FIG 1-2. XA501 (24.576 MHz)
2
2. FLASH MEMORY
3
4
5
6
SF_CS
3.3VA
SF_DI
SF_CLK
SF_DO
DGND
DGND
C103
100nF
R108
4.7K
R110
4.7K
R107
4.7K
R106
4.7K
R109
NC
IC102
1
CS#
2
SO
3
WP#
4
VSS
5
SI
6
SCLK
7
HOLD#
8
VCC
1
R506
1M
NC
X501
27MHz
1
IN/OUT
2
FLOAT
3
ININ/OUT
4
FLOAT
R505
1.8K
C563
15pF
C564
15pF
DGND
Close to IC501
2
C600
8pF
C620
8pF
R601
1M
R600
2.2K
DGND
X600
24.576MHz
1
INPUT/OUTPUT
2
FLOAT
3
INPUT/OUTPUT
4
FLOAT
FIG 2. VCC, CS#, CLK, DO
3
4
5
6
VCC
CS#
CLK
DO