ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
ATA/ATAPI-6 Interface Timing
The following tables and figures specify ATAPI timing parame-
ters. For detailed parameter descriptions, refer to the ATAPI
specification (ANSI INCITS 361-2002). Table 58 to Table 61
include ATAPI timing parameter equations. System designers
should use these equations along with the parameters provided
in Table 56 and Table 57. ATAPI timing control registers
should be programmed such that ANSI INCITS 361-2002 speci-
fications are met for the desired transfer type and mode.
Table 56. ATA/ATAPI-6 Timing Parameters
Parameter
tSK1
tOD
Min
Max
6
Unit
ns
Difference in output delay after CLKOUT for ATAPI output pins1
Output delay after CLKOUT for outputs1
12
ns
tSUD
tSUI
ATAPI_D0-15 or ATAPI_D0-15A Setup Before CLKOUT
ATAPI_IORDY Setup Before CLKOUT
6
ns
6
ns
tSUDU
ATAPI_D0-15 or ATAPI_D0-15A Setup Before ATAPI_IORDY (UDMA-in only)
2
ns
tHDU
ATAPI_D0-15 or ATAPI_D0-15A Hold After ATAPI_IORDY (UDMA-in only)
2.6
ns
1 ATAPI output pins include ATAPI_CS0, ATAPI_CS1, A1-3, ATAPI_DIOR, ATAPI_DIOW, ATAPI_DMACK, ATAPI_D0-15, ATAPI_A0-2A, and ATAPI_D0-15A.
Table 57. ATA/ATAPI-6 System Timing Parameters
Parameter
tSK2
tBD
Source
System Design
System Design
Maximum difference in board propagation delay between any 2 ATAPI output pins1
Maximum board propagation delay.
tSK3
Maximum difference in board propagation delay during a read between ATAPI_IORDY and ATAPI_D0- System Design
15/ATAPI_D0-15A.
tSK4
Maximum difference in ATAPI cable propagation delay between output pin group A and output pin ATAPI Cable Specification
group B2
tCDD
tCDC
ATAPI cable propagation delay for ATAPI_D0-15 and ATAPI_D0-15A signals.
ATAPI Cable Specification
ATAPI cable propagation delay for ATAPI_DIOR, ATAPI_DIOW, ATAPI_IORDY, and ATAPI_DMACK signals. ATAPI Cable Specification
1 ATAPI output pins include ATAPI_CS0, ATAPI_CS1, A1-3, ATAPI_DIOR, ATAPI_DIOW, ATAPI_DMACK, ATAPI_D0-15, ATAPI_A0-2A, and ATAPI_D0-15A.
2 Output pin group A includes ATAPI_DIOR, ATAPI_DIOW, and ATAPI_DMACK. Output pin group B includes ATAPI_CS0, ATAPI_CS1, A1-3, ATAPI_D0-15,
ATAPI_A0-2A, and ATAPI_D0-15A.
Rev. C
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Page 74 of 100
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February 2010
ADI [ ADI ]
