Samsung SF-830 Service Manual page 128

No Pin Name
181 DRAMA4
182 Vsso
183 DRAMA5
184 DRAMA6
185 DRAMA7
186 Vddo
187 DRAMA8
188 Vsso
189 DRAMA9
190 DRAMA10
191 DRAMA11
192 Vssi
193 nROMCS0
194 Vddi
195 nROMCS1
196 nROMCS2
197 nROMCS3
198 nROMRD
199 Vssp
200 nROMWR
201 Vddp
202 ADDR2
203 ADDR3
204 ADDR4
205 Vsso
206 ADDR5
207 ADDR6
208 ADDR7
209 Vssi
210 ADDR8
Samsung Electronics
I/O Reset Value
O L
Vss -
O "
O "
O "
Vdd -
O L
Vss -
O L
O " DRAM Address Bus 10
O " DRAM Address Bus 11
Vss -
O H
Vdd -
O H
O "
O "
O "
Vss -
O H
Vdd -
O L Address Bus 2 for ROM
O " Address Bus 3 for ROM
O " Address Bus 4 for ROM
Vss -
O L Address Bus 5 for ROM
O " Address Bus 6 for ROM
O " Address Bus 7 for ROM
Vss -
O L Address Bus 8 for ROM
CIRCUIT DESCRIPTION
Description
DRAM Address Bus 4
5 V Gnd
DRAM Address Bus 5
DRAM Address Bus 6
DRAM Address Bus 7
5 V
DRAM Address Bus 8
5 V Gnd
DRAM Address Bus 9
3.3 V Gnd
ROM Chip Select 0
3.3 V
ROM Chip Select 1
ROM Chip Select 2
ROM Chip Select 3
ROM or IO Read
5 V Gnd
ROM or IO Write
5 V
5 V Gnd
3.3 V Gnd
PAD
PHOB8, 8 mA
"
"
"
PHOB8, 8 mA
PHOB8, 8 mA
"
"
PHOB4, 4 mA
PHOB4, 4 mA
"
"
PHOB8, 8 mA
PHOB8, 8 mA
PHOB8, 8 mA
"
"
PHOB8, 8 mA
"
"
PHOB8, 8 mA
Repair Manual
3-9