Onkyo TX-L55 Service Manual page 32

IC BLOCK DIAGRAMS AND DESCRIPTIONS
CS494003(Audio Decoder DSP)
FILT1 - Phase-Locked Loop Filter
FILT2 - Phase Locked Loop Filter
CLKIN, XTALI - External Clock Input/Crystal Oscillator Input
XTALO - Crystal Oscillator Output
CLKSEL - DSP Clock Select
FDAT0~FDAT7 - DSPAB Bidirectional Data Bus
FA0, FSCCLK - Host Parallel Address Bit Zero or Serial Control Port Clock
FHS1, FRD, FR/W - Mode Select Bit 1 or Host Parallel Output Enable or Host Parallel R/W
FHS0, FWR, FDS - Mode Select Bit 0 or Host Write Strobe or Host Data Strobe
FCS - Host Parallel Chip Select, Host Serial SPI Chip Select
FHS2, FSCDIO, FSCDOUT - Mode Select Bit 2 or Serial Control Port Data Input and
Output, Parallel Port Type Select
FINTREQ - Control Port Interrupt Request
FSCLKN1, STCCLK2 - PCM Audio Input Bit Clock
FLRCLKN1 - PCM Audio Input Sample Rate Clock
FSDATAN1 - PCM Audio Data Input One
CMPCLK, FSCLKN2 - PCM Audio Input Bit Clock
CMPDAT, FSDATAN2 - PCM Audio Data Input Number Two
FDBCK - Reserved
FDBDA - Reserved
PLLVDD - PLL Supply Voltage
PLLVSS - PLL Ground Voltage
RESET - Master Reset Input
TEST - Reserved
MCLK - Audio Master Clock
SCLK0 - Audio Output Bit Clock
SCLK1 - Audio Output Bit Clock
LRCLK0 - Audio Output Sample Rate Clock
LRCLK1 - Audio Output Sample Rate Clock
AUDATA0 - Digital Audio Output 0
AUDATA1 - Digital Audio Output 1
AUDATA2 - Digital Audio Output 2
AUDATA3, XMT958A - Digital Audio Output 3, S/PDIF Transmitter
AUDATA4, GPIO28 - Digital Audio Output 4, General Purpose I/O
AUDATA5, GPIO29 - Digital Audio Output 5, General Purpose I/O
AUDATA6, GPIO30 - Digital Audio Output 6, General Purpose I/O
AUDATA7, XMT958B, GPIO3 - Digital Audio Output 7, S/PDIF Transmitter, General Purpose I/O
DBCK - Debug Clock
DBDA - Debug Data
SLCKN, GPIO22 - PCM Audio Input Bit Clock, General Purpose I/O
LRCLKN, GPIO23 - PCM Audio Input Sample Rate Clock, General Purpose I/O
SDATAN0, GPIO24 - PCM Audio Input Data, General Purpose I/O
SDATAN1, GPIO25 - PCM Audio Input Data, General Purpose I/O
SDATAN2, GPIO26 - PCM Audio Input Data, General Purpose I/O
SDATAN3, GPIO27 - PCM Audio Input Data, General Purpose I/O
SCS - Host Serial SPI Chip Select
SCCLK - Serial Control Port Clock
SCDIN - SPI Serial Control Data Input
SCDOUT, SCDIO - Serial Control Port Data Input and Output
INTREQ - Control Port Interrupt Request
HDATA1~HDATA7, GPIO1~GPIO7 - DSPC Bidirectional Data Bus, General Purpose I/O
A0, GPIO13 - Host Parallel Address Bit 0, General Purpose I/O
A1, GPIO12 - Host Address Bit 1, General Purpose I/O
RD, R/W, GPIO11 - Host Parallel Output Enable, Host Parallel R/W, General Purpose I/O
WR, DS, GPIO10 - Host Write Strobe, Host Data Strobe, General Purpose I/O
CS, GPIO9 - Host Parallel Chip Select, General Purpose I/O
HINBSY, GPIO8 - Input Host Message Status, General Purpose I/O
SD_DATA8~SD_DATA15, EXTA11~EXTA18 - SDRAM Data Bus, SRAM External Address Bus
SD_DATA0~SD_DATA7, EXTD0~EXTD7 - SDRAM Data Bus, SRAM External Data Bus
SD_ADDR0~SD_ADDR10, EXTA0~EXTA10 - SDRAM Address Bus, SRAM External Address Bus
SD_CLK_OUT - SDRAM Clock Output
SD_CLK_IN - SDRAM Re-timing Clock Input
SD_CLK_EN - SDRAM Clock Enable
SD_BA, EXTA19 - SDRAM Bank Address Select, SRAM External Address Bus
SD_CS - SDRAM Chip Select
SD_RAS - SDRAM Row Address Strobe
SD_CAS - SDRAM Column Address Strobe
SD_WE - SDRAM Write Enable
SD_DQM1 - SDRAM Data Mask 1
SD_DQM0 - SDRAM Data Mask 2
NV_CS, GPIO14 - SRAM Chip Select, General Purpose I/O
NV_OE, GPIO15 - SRAM Output Enable, General Purpose I/O
NV_WE, GPIO16 - SRAM Write Enable, General Purpose I/O
UHS2, CS_OUT, GPIO17 - Mode Select Bit 2, External Serial Memory Chip
Select, G eneral Purpose I/O
UHS0, GPIO18 - Mode Select Bit 0, General Purpose I/O
UHS1, GPIO19 - Mode Select Bit 1, General Purpose I/O
GPIO20 - General Purpose I/O
GPIO21 - General Purpose I/O
VSS - 2.5V Ground
NC[5:1] - No Connect
VDDSD[4:1] - 3.3V SDRAM/SRAM/EPROM Interface Supply
VDD[7:1] - 2.5V Supply Voltage
VSSSD - 3.3V SDRAM/SRAM/EPROM Interface Ground
TX-L55/LR552