SanDisk CompactFlash Product Manual page 33

2. This parameter specifies the time from the negation edge of /IORD to the time that the data bus is no longer
driven by the device (tri-state).
3. SanDisk CompactFlash Memory Cards do not assert an -IORDY signal.
PIO Data Transfers
Figure 3-6 defines the relationships between the interface signals for PIO data transfers.
For PIO modes 3 and above, the minimum value of t
list. Table 3-9 defines the minimum value that shall be placed in word 68.
ADDR valid
(See note 1)
IORD-/IOWR-
WRITE
DD(15:0)
(See note 2)
READ
DD(15:0)
(See note 2)
1. Device address consists of signals -CS0, -CS1 and -DA(2:0).
2. Data consists of DD(15:0).
3. SanDisk CompactFlash Memory Cards do not assert an -IORDY signal.
4. All signals are shown with the asserted condition facing the top of the page. The negated condition is
shown towards the bottom of the page relative to the asserted condition.
®
CompactFlash Memory Card Product Manual, Rev. 10.0 © 2002 SANDISK CORPORATION
is specified by word 68 in the IDENTIFY DEVICE parameter
0
t 1
t 2
Figure 3-6. PIO Data Transfer To/From Device
CompactFlash Memory Card Interface Description
t 0
t 3
t 5
t 9
t 2i
t 4
t 6
t 6z
3-17