LG CED-8083B Service Manual page 56

Pin No. Pin Name
67 DMACK#
IORDY/
68 DDMARDY#/
DSTROBE
HRD#/
69 HDMARDY#/
HSTROBE
70 HWR#/
STOP
131 ARST
SYSTEM CONTROLLER Interface
Pin No. Pin Name
95 PRST#
106 UCS0#
107 UCS1#
104 URD#
105 UWR#
110 URDY
113 SDINT#
112 UINT1#
111 UINT0#
103 UAD7
102 UAD6
101 UAD5
100 UAD4
99 UAD3
98 UAD2
97 UAD1
96 UAD0
Type
I/O ATA DMA Acknowledge/DMA Request : ATAPI DMA acknowledge
DMA request when connected to SCSI controller
O ATA Host I/O Ready : I/O channel ready
TS
UDMA : DDMARDY#, device DMA ready; DSTROBE, device data strobe
I/O ATA Host Read Strobe/SCSI DMA Read Strobe
PUA
UDMA : HDMARDY#, host DMA ready; HSTROBE, host data strobe
I/O ATA Host Write Strobe/SCSI DMA Write Strobe
PUA
UDMA : Host stop
O ATAPI Reset
TS
Type
I System Reset : Internal state machines are reset and all registers are set to
S
default. The assertion and negation signal of PRST# can be ASYNC to XIN but
needs to be longer then 1 XIN, because the signal goes through a de-glitch circuit.
I Chip Select 0 : Enables access to internal registers
S
I Chip Select 1 : Enables access to buffer memory
S
Read Enable/Data Strobe : Read enable/data strobe input for read
I If CPUTYPE = VCC (Intel) – This pin is read enabled.
S
If CPUTYPE = GND (Motorola) – This pin is data strobe.
Write Enable/Data read Status : Write enable/data read write status input for read
I If CPUTYPE = VCC (Intel) – This pin is write enabled.
S
If CPUTYPE = GND (Motorola) – This pin is read/write status.
I/O Ready : Data ready
PU
Select use/no use by setting internal registers
When accessing internal registers or buffer memory, this signal is asserted after
fixing driven data.
If no access, this pin is Hi-Z.
Hi-Z status at reset.
SDINT# : CD-DSP and CD-Servo system input.
O System Interrupt Request 1 & 0 : CD-Decoder/-Encoder interrupt Signals
PU
selected by bits INTSEL4-0 in the INTMODE Register (005h,4-0)
I/O Address and Data : Address and data are multiplexed in the same pin.
If I/O only data, fix UALE to GND.
These Signals ARE Hi-Z when chip is reset.
Description
Description
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