LSI Logic Confidential
6-13
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
DVD (SD) Interface
As a Bitstream I/O pin, DVD (SD) signals are shared with up to two other signals per pin. One of
these three possible configurations is selected by MCONFIG[2:0] and the DVD control register (see
description of DVD control register on
When the Bitstream I/O interface is in SD/SBP mode, the master interface M_A[21:6]/M_D[15:0] pins
are shared with SD_DATA[7:0]/SBP_DATA[7:0] pins.
SD_DATA[7:0]
N1, N2, N4, P1,
P3, P4, R3, R4
I/O
SD_DATA is the bidirectional parallel data bus.
When SD DSP transfers 32-bit data, it must write
the most significant byte first. Multiplexed with
ATAPI_DATA[7:0]
SD_SECSTART
U1
I/O
The SD sector start indicator. Multiplexed with
ATAPI_DMAACK.
SD_CLK
T3
I
SD data clock in both sync or async mode.
Multiplexed with ATAPI_IORDY. If SD_CLK = 1, then
input data and control signals are sampled on the
rising edge; otherwise they are sampled on the
falling edge.
SD_RDREQ
V3
O
The chip asserts SD_RDREQ to indicate that the
internal buffer has available space and it is ready to
perform a read (SD_WRREQ = 1) or that it will be
reading data (SD_WRREQ = 0). Multiplexed with
ATAPI_DIOR.
SD_WRREQ
T1
O
The chip asserts SD_WRREQ to indicate that it has
writable data (SD_WRREQ = 1) or that it is ready to
take or give data (SD_WRREQ = 0). In the latter
case, the direction of the transfer is indicated by
SD_RDREQ. Multiplexed with ATAPI_DIOW.
SD_ACK
W2
I
Transfer of data acknowledged by system. Active
low if SD_ACK = 0, otherwise active high.
Multiplexed with ATAPI_INTRQ.
SD_ERROR
W1
I
The DSP asserts this signal to indicate that an error
has occurred. If DSP does not provide an error
signal, ground this pin. Multiplexed with
ATAPI_DMARQ.
Table 6.1
DMN-8600 Pin Descriptions (Cont.)
Name
Pin No.
Type
1
Description