Sharp DV-550U Service Manual

Also see for DV-550U: Technical manual

DV-550U12-9. IC504 IX1478GESYSCONMD2VccVccVccVccVccVssVssVssVssVssVssVssVssPD7/D15PD6/D14PD5/D13PD4/D12PD3/D11PD2/D10PD1/D9PD0/D8PE7/D7PE6/D6PE5/D5PE4/D4PE3/D3PE2/D2PE1/D1PE0/D0PA7/A23/IRQ7PA 6/A22/IRQ6MD1MD0PF7/øPF 6/ASPF 5/RDPF 4/HWREXTALXTALSTBYRESWDTOVFNMIPF3/LWRPF1/BACKPF0/BREQPG4/CS0PG3/CS1PG2/CS2PG1/CS3PG0/CASP67/CS7/IRQ3P66/CS6/IRQ2P65/IRQ1P64/IRQ0P63/TEND1P62/DREQ1P61/TEND0/CS5P60/DREQ0/CS4PF2/LCAS/WAIT/BFEQOP10/PO8/TIOCA0/DACK0P1 1/PO9/TIOCB0/DACK1P1 2/PO10/TIOCC0/TCLKAP1 3/PO11/TIOCD0/TCLKBP1 4/PO12/TIOCA1P1 5/PO13/TIOCB1/TCLKCP1 6/PO14/TIOCA2P1 7/PO15/TIOCB2/TCLKDP2 0/PO0/TIOCA3P2 1/PO1/TIOCB3P2 2/PO2/TIOCC3P2 3/PO3/TIOCD3P2 4/PO4/TIOCA4P2 5/PO5/TIOCB4P2 6/PO6/TIOCA5P2 7/PO7/TIOCB5P4 7/AN7/DA1P4 6/AN6/DA0P4 5/AN5P4 4/AN4P4 3/AN3P4 2/AN2P4 1/AN1P4 0/AN0VrefAVccAVssPA5/A21/IRQ5PA4/A20/IRQ4PA 3/A19PA2/A18PA1/A17PA0/A16PB7/A15PB6/A14PB5/A13PB4/A12PB3/A11PB2/A10PB1/A9PB0/A8PC7/A7PC6/A6PC5/A5PC4/A4PC3/A3PC2/A2PC1/A1PC0/A0P35/SCK1P3 4/SCK0P3 3/RxD1P3 2/RxD0P3 1/TxD1P3 0/TxD0P5 0P51P52P53/ADTRGROM *RAMTPUPPGSCIWDTDMACDTCH8S/2000 CPUD/A converterA/D converterClock oscillatorInterruptioncontrollerBass ControllerPort DPort FPort GPort 6Port 5 Port 3 Port C Port B Port APort EPort 1 Port 2 Port 4Internal data busPeripheral data busPeripheral address busInternal address bus12-18