MPC857T Freescale Semiconductor, Inc, MPC857T Datasheet - Page 37

• Manufacturer Part Number: MPC857T
• Description: Mpc857t Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Table 9
Freescale Semiconductor
1
P44
P45
P46
P47
P48
P49
P50
P51
P52
P53
P54
P55
P56
Num
PSHT = 0. Otherwise add PSHT times cycle time.
These synchronous timings define when the WAITx signals are detected in order to freeze (or relieve) the PCMCIA
current cycle. The WAITx assertion will be effective only if it is detected 2 cycles before the PSL timer expiration. See
PCMCIA Interface in the MPC862 PowerQUICC User s Manual .
PSST = 1. Otherwise add PSST times cycle time.
shows the PCMCIA timing for the MPC862/857T/857DSL.
A(0:31), REG valid to PCMCIA
Strobe asserted.
B1 - 2.00)
A(0:31), REG valid to ALE
negation.
2.00)
CLKOUT to REG valid (MAX =
0.25 x B1 + 8.00)
CLKOUT to REG Invalid. (MIN =
0.25 x B1 + 1.00)
CLKOUT to CE1, CE2 asserted.
(MAX = 0.25 x B1 + 8.00)
CLKOUT to CE1, CE2 negated.
(MAX = 0.25 x B1 + 8.00)
CLKOUT to PCOE, IORD, PCWE,
IOWR assert time. (MAX = 0.00 x
B1 + 11.00)
CLKOUT to PCOE, IORD, PCWE,
IOWR negate time. (MAX = 0.00 x
B1 + 11.00)
CLKOUT to ALE assert time
(MAX = 0.25 x B1 + 6.30)
CLKOUT to ALE negate time
(MAX = 0.25 x B1 + 8.00)
PCWE, IOWR negated to D(0:31)
invalid.
WAITA and WAITB valid to
CLKOUT rising edge.
0.00 x B1 + 8.00)
CLKOUT rising edge to WAITA
and WAITB invalid.
B1 + 2.00)
1
(MIN = 0.25 x B1 - 2.00)
Characteristic
1
MPC862/857T/857DSL PowerQUICC™ Family Hardware Specifications, Rev. 3
(MIN = 1.00 x B1 -
1
1
(MIN = 0.75 x
(MIN = 0.00 x
1
(MIN =
20.70
28.30
Table 9. PCMCIA Timing
7.60
8.60
7.60
7.60
2.00
7.60
5.60
8.00
2.00
Min
—
—
33 MHz
15.60
15.60
15.60
11.00
11.00
13.80
15.60
Max
—
—
—
—
—
—
16.70
23.00
6.30
7.30
6.30
6.30
2.00
6.30
4.30
8.00
2.00
Min
—
—
40 MHz
14.30
14.30
14.30
11.00
11.00
12.50
14.30
Max
—
—
—
—
—
—
13.00
18.00
5.00
6.00
5.00
5.00
2.00
5.00
3.00
8.00
2.00
Min
—
—
50 MHz
13.00
13.00
13.00
11.00
11.00
11.30
13.00
Max
—
—
—
—
—
—
13.20
9.40
3.80
4.80
3.80
3.80
2.00
3.80
1.80
8.00
2.00
Min
—
—
66 MHz
11.80
11.80
11.80
11.00
11.00
10.00
11.80
Max
Bus Signal Timing
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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