AD1812 データシートの表示（PDF） - Analog Devices
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AD1812 Datasheet PDF : 20 Pages
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AD1812
PIN DESCRIPTION
Parallel Interface
Pin Name
P/TQFP
I/O
PC_D[15:0]
128–131, 136–139, I/O
142–145, 150–153
IRQ(x)
108–115
O
DRQ(x)
98–103
O
PC_A[15:0]
8–15, 18–25
I
AEN
32
I
DACK (x)
84–85, 87–90
I
IOR
26
I
IOW
33
I
SBHE
7
I
IOCH16
97
O
RESET
35
I
RESET
119
I
Description
ISA Bus PC Data. PC_D15 to PC_D8 in conjunction with an active HI
SBHE connects the AD1812 to the high byte data on the bus, while PC_D7
to PC_D0 connects to the low byte data on the bus.
Interrupt Request. IRQ (3, 4, 5, 7, 9, 10, 11, 12). Active HI signals indicating a
pending interrupt.
DMA Request. DRQ (0, 1, 3, 5, 6, 7). Active HI signals indicating a request for
DMA bus operation. DRQ0, DRQ1 and DRQ3 request 8-bit DMA operations
while DRQ5, DRQ6 and DRQ7 request 16-bit operations.
ISA Bus PC Address. Connects the AD1812 to the ISA bus address lines.
Address Enable. Active HI signal indicates DMA transfer. Active LO signal
indicates PIO transfer.
DMA Acknowledge. DACK (0, 1, 3, 5, 6, 7). Active LO signal indicating that a
DMA operation can begin.
I/O Read indicates a read operation.
I/O Write indicates a write operation.
System Byte High Enable. Active LO signal that indicates a byte is being trans-
ferred on the upper byte of the 16-bit bus.
IO Channel 16. Active LO signal indicating that one of the logical devices inside
the AD1812 is decoded as a 16-bit device.
Reset. Active HI.
Inverted Reset. Active LO.
Analog Signals
Pin Name
L_LINE
R_LINE
L_MIC
R_MIC
L_AUX1
R_AUX1
L_AUX2
R_AUX2
L_OUT
R_OUT
MONO_IN
M_OUT
L_DACOUT
R_DACOUT
L_DACIN
R_DACIN
L_MONOIN
R_MONOIN
P/TQFP
56
55
58
57
64
63
66
65
69
68
71
73
78
75
77
76
70
67
I/O Description
I
Left Line-Level Input.
I
Right Line-Level Input.
I
Left Microphone Input.
I
Right Microphone Input.
I
Left Auxiliary #1 Line-Level Input. Also used for CD input.
I
Right Auxiliary #1 Line-Level Input. Also used for CD input.
I
Left Auxiliary #2 Line-Level Input. Also used for a wavetable input.
I
Right Auxiliary #2 Line-Level Input. Also used for a wavetable input.
O
Left Line-Level Output. Left channel post-mixed output.
O
Right Line-Level Output. Right channel post-mixed output.
I
Mono Input.
O
Mono Output. Sum of L_OUT and R_OUT.
O
Left DAC Out. Left channel games audio output.
O
Right DAC Out. Right channel games audio output.
I
Left DAC In. When coupled to L_DACOUT, allows mixing of left channel games
audio with left channel audio converted by the codec. The post-mixed output is avail-
able on L_OUT.
I
Right DAC In. When coupled to R_DACOUT, allows mixing of right channel games
audio with right channel audio converted by the codec. The post-mixed output is
available on R_OUT.
I
Left Mono In. When coupled to L_OUT, M_OUT reflects the left post-mixed output.
I
Right Mono In. When coupled to R_OUT, M_OUT reflects the right post-mixed output.
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REV. 0
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