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Timing Of Host Interface (Ultra Dma) - Toshiba SD-M1212 - DVD-ROM Drive - IDE Specifications

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6.2.5.Timing of Host Interface (Ultra DMA)

Figure 11 shows the Host Interface Ultra DMA Timings
STROBE
DIOR/IORDY
DD (15:0)
Send
STROBE
IORDY/DIOR
DD (15:0)
Recive
Note: DD (15:0) and DSTROBE signals are shown at both the host and the device to emphasize
that cable setting time as well as cable propagation delay shall not allow signal to be
considered stable at the host unit some time after they are drive by the device.
MODE
NAME
0
MIN
t
114
CYC
t2
235
CYC
t
15
DS
t
5
DH
t
70
DVS
t
6
DVH
t
CYC
t
DVH
t
DVS
t
t
DH
DS
MODE
1
MAX
MIN
MAX
75
156
10
5
48
6
Figure 11 Host inter face timing (Ultra DMA)
t
2CYC
t
CYC
t
DVH
t
DVS
t
t
DH
DS
MODE
COMMENT
2
MIN
MAX
Cycle time (from STROBE edge to STROBE edge)
55
Two cycle time (from risingedge to next rising edge
117
of from falling edge to next falling edge of STROBE)
Data setup time (at recipient)
7
5
Data hold time (at recipient)
Data valid setup time at sender (time form data bus
34
being valid until STROBE edge)
Data valid hold time at sender (time form STROBE
6
edge until data may go invalid)
17/28
t
2CYC
t
DVH
t
DH
SD-M1212 Rev.1.0

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