Sanyo NV-E7500 - Navigation System With DVD Player Service Manual page 21

EXPLANATION OF MICROCOMPUTER
IC 30 (LC24072B) 1/2
Pin
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Signal I/O
LVcc
HD8
HD7
HD9
HD6
HD10
I/O ATAPI data bus
HD5
HD11
HD4
HD12
HD3
HD13
GND GND
HD2
HD14
I/O ATAPI data bus
HD1
HD15
HD0
LVcc POWER +3.3V
HDREQ I ATAPI DMA transmit request
/HDR O ATAPI Read strobe
/HWR O ATAPI Write strobe
/HIORDY I ATAPI Wait
/HDACK O ATAPI DMA transmit strobe
HA1 O ATAPI Address bus
HA0 O ATAPI Address bus
HA2 O ATAPI Address bus
/HCS1 O ATAPI Control Register chip select
/HCS3 O ATAPI Command Register chip select
GND GND
LVcc POWER +3.3V
FM-ASIC I NC
ASIC-FM O NC
BEACON-ASIC I NC
ASIC-BEACON O
NC
GYRO-ASIC I GYRO data received
ASIC-GYRO O GYRO data transmission
MAIN-ASIC I SH communication
ASIC-MAIN O SH communication
IRQ_FM O NC
IRQ_BEACON O NC
IRQ_GYRO O GYRO data cut in
- - NC
VCK I Clock input(7.15909MHz)
SC O 3.579545MHz output
PLLCK O 15.7342MHz output
GND G
/CS_CARD O PC card chip select
/LOAD I BOOT Soft load
SI O Serial data output(Voice guidance)
LRCK O L/R clock(Voice guidance)
SCK O Clock output(Voice guidance)
/WAIT_Q2 I Q2i Wait input
/CS_Q2UGM O Q2i UGM chip select
/CS_Q2REG O Q2i inside register chip select
ADPCM_SW I ADPCM switch
GND GND
/RST_3 I Power on reset
CKIO I System clock input(39.3216MHz)
GND GND
LVcc POWER +3.3V
/FCS O Flash memory chip select
/FEW. O Flash memory write strobe
/DREQ1 O DMA request
/DREQ0 O DMA request
Function
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