DDR Write Timing: Data written to a data direction register (DDR) to change a CS
n
pin from
CS
n
output to generic input, or vice versa, takes effect starting from the T
3
state of the DDR write
cycle. Figure 6-21 shows the timing when the CS
1
pin is changed from generic input to CS
1
output.
Figure 6-21 DDR Write Timing
BRCR Write Timing: Data written to switch between A
23
, A
22
, or A
21
output and generic input
or output takes effect starting from the T
3
state of the BRCR write cycle. Figure 6-22 shows the
timing when a pin is changed from generic input to A
23
, A
22
, or A
21
output.
Figure 6-22 BRCR Write Timing
ø
CS
1
T
1
T
2
T
3
P8DDR address
High impedance
Address
bus
ø
A to A
23
T
1
T
2
T
3
BRCR address
High impedance
Address
bus
21
145
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