DP8496 datasheet(78/92 Pages) NSC

78 / 92 page

70 AC Specifications (Continued)

714 DISK WRITE DATA AND WRITE GATE TIMING

TLF11212 – 48

Symbol

Parameter

Min

Max

Units

141

rcwch

RCLK to WCLK High (Note 1)

142

rcwcl

RCLK to WCLK Low (Note 1)

143

rcwga

RCLK to Write Gate Asserted

144

rcwgd

RCLK to Write Gate Deasserted

145

wds

Write Data Setup to WCLK (Note 2)

rcl b 5ns

146

wdh

Write Data Hold from WCLK (Note 2)

rch b 5ns

Note 1

The absolute value of rcwch–rcwcl is 5 ns (max)

Note 2

rcl refers to the RCLK low time in use rch refers to the RCLK high time in use This formula is tested ony at the frequencies listed in Table 81

Note 3

The WCLK transitions start before the WGATE is asserted and three cycles occur before WGATE assertion

715 DISK ADDRESS MARK (PSEUDO-HARD SECTORED FORMAT)

TLF11212 – 49

Symbol

Parameter

Min

Max

Units

151

came

RCLK to Address Mark Enable

152

amfs

Address Mark Found Setup to RCLK

716 SCSI RESET

TLF11212 – 50

Symbol

Parameter

Min

Max

Units

161

srst

SCSI RST to All SCSI Lines Undriven

600

162

rstw

SCSI RST Width (Note 1)

2 bcp

Note 1

bcp refers to the BCLK period in use This formula is tested only at the frequencies listed in Table 81

All SCSI signals are active-high on the DP8497

DP8496 Datasheet(PDF) 78 Page - National Semiconductor (TI)

DP8496 Datasheet(HTML) 78 Page - National Semiconductor (TI)

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