Power On Reset - Samsung CLP-600 Series Service Manual

Main Board(2/21)
1
A
3.3V9248
R165
RA30
SIO
nCPUSTOP
nSDRSTOP
nPD
nCLKSTOP
R178
B
+3.3V
E8
Check 3.3V
C
3.3V9248
F6
C126
C121
C128
DGND
D
R185
OSC4
E
C144 C145
14.318MHz
DGND
F
Service Manual
11-2
2 3
3.3V9248
Place each 100nF very close to Power Pin
C169 C154 C168 C157 C167 C166
DGND
+3.3V 3.3V9248
R570
1 : DESKTOP MODE
0 : MOBILE MODE
NR53
DGND
MODE
nCPUSTOP nCPUSTOP
nCLKSTOP
nPCISTOP
nSDRSTOP nSDRSTOP
nPD nPD
nCPU25_33
R161
U33
DGND ICS9248-81
SD_SEL
SD_SEL
IOAPIC
* Input only I2C
VDDLAPIC 1205-002660
NR50
SDA_V320
SDATA
NR51
SCL_V320 SCLK
9248_XIN
X1
9248_XOUT
X2
9248_XIN
DGND
SW1
* check CL value
9248_XIN
+3.3V +3.3V
9248_XOUT
R282
R218
U41
R249
C72
C208
* 1st POR : 189ms
DGND DGND

Power On Reset

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4 5
75M_1
I_CPUCLK1
R162
NC24
NC25
C263
C118
75M_2
DGND
R283
I_CPUCLK2
NC27 NC26
DGND
R163
C123
SDRAMCLK0
DGND
FS1
CPUCLK3 FS2
CPUCLK2
CPUCLK1
PCICLK_F
R180
PCICLK0
I_PCLK_WLAN R181
PCICLK1
I_PCLK_HYPERC R182
PCICLK2
R183
I_PCLK_V320
PCICLK3
R184
I_PCLK_PLD
PCICLK4
NC3 NC4 NC5 NC8
SDRAM12
E16
Check 24MHz?
SIO
SIO
48MHZ
E14
DGND
Check 48MHz?
FS0
SDRAM7
SDRAM6
SDRAM5
SDRAM4
SDRAM3
R567
SDRAM2
24MHZ
SDRAM1
SDRAM0
* Place NC5 very close to Hyper-C
*System Reset Switch
DGND
nRESET
Check High
nRESET
6 7
Check 75MHz?
CPUCLK1
Check 75MHz?
CPUCLK2
CLOCK SELECTION
SDRCLK0
Check 75MHz?
+3.3V +3.3V
NR25 NR24
PCLK_LAN
PCLK_WLAN
PCLK_HYPERC
FS1
NR49
R297 R296
PCLK_V320
NR48
PCLK_PLD
DGND DGND
+3.3V +3.3V
*Reserved
R279 R280
SD_SEL
NR26
DGND
FS2 FS1 FS0 CPU
0 0 1 75.0
05.04.01
Schematic Diagram
8
A
B
FS2
C
FS0
SDRAM PCI
75.0 30.0
CLP-600
daVinci MAIN GDI
Rev 0.4
2/21
ICS9248-81& RESET
Samsung Electronics