Samsung SF-830, Service Manual

Page: 125 / 189

3-6
CIRCUIT DESCRIPTION
Samsung Electronics
Repair Manual
No Pin Name I/O Reset Value Description PAD
91 nDREQ1/RxD2/CTin[1] I - DMA Request1/Uart 2 RxD PHIL, ST
92 nDMACK1 / TxD2 O H DMA Ack1/Uart 2 TxD PHOB4, 4 mA
93 nIOCS1 / nIOCS5 O " IO CS1 / DMA IO1 CS "
94 Vddi Vdd - 3.3 V
95 nDREQ0 /IP1/CTin[0] I - DMA Request0 / Input Port PHIL, ST
96 nDMACK0 / OP1 O H DMA Ack1 / Out Port PHOB4, 4 mA
97 nIOCS4 / OP2 O " DMA IO0 CS / Out Port "
98 EIRQ0 I - External Interrupt 0 PHILU50, ST
99 EIRQ1 I - External Interrupt 1 "
100 EIRQ2 I - External Interrupt 2 "
101 nWait / EIRQ3 I - Wait Request / Ex. IRQ 3 "
102 Vssi Vss - 3.3 V Gnd
103 VCLK I - Video Clock Input PHIC
104 Vddi Vdd - 3.3 V
105 IP[7] / nFSYNC I - Input Port / Frame Sync PHIL, ST
106 nLSYNC I - Line Sync "
107 OP[8] / nPRINT O H Out Port / Print Start PHOB4, 4 mA
108 Vssi Vss - 3.3 V Gnd
109 VDO O H Video Data Output PHOB16, 16mA
110 Vsso Vss - 5 V Gnd
111 CCLK / PWM[0] O H Com. Clock / PWM [0] PHOB4, 4 mA
112 nEPRDY / RxD0 I -
Engine Power Ready
/ Uart 0 Rx Data
PHIL, ST
113 nCBSY / TxD0 O H
Command Busy
/ Uart 0 Tx Data
PHOB4, 4 mA
114 nEMSG / PWM[1] I/O Input Eng. Message / PWM [1] PHBLT4,ST,4mA
115 nEBSY / nLsuReady I - Eng. Busy / LSU Ready PHIL, ST
116 nCMSG / PWM[2] O H Com. Busy / PWM [2] PHOB4, 4 mA
117 Vddo Vdd - 5 V
118 nDRAMCAS0 O L DRAM Cas Strobe 0 PHOB8, 8 mA
119 nDRAMCAS1 O " DRAM Cas Strobe 1 "
120 nDRAMCAS2 O " DRAM Cas Strobe 2 "