參數(shù)資料
型號(hào): MPC862
廠商: Motorola, Inc.
英文描述: Hardware Specifications
中文描述: 硬件規(guī)格
文件頁數(shù): 37/88頁
文件大小: 1104K
代理商: MPC862
MOTOROLA
MPC862/857T/857DSL Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
37
Bus Signal Timing
Table 9 shows the PCMCIA timing for the MPC862/857T/857DSL.
Table 9. PCMCIA Timing
Num
Characteristic
33 MHz
40 MHz
50 MHz
66 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
P44
A(0:31), REG valid to PCMCIA
Strobe asserted.
1
(MIN = 0.75 x
B1 - 2.00)
1
PSST = 1. Otherwise add PSST times cycle time.
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
.
20.70
16.70
13.00
9.40
ns
P45
A(0:31), REG valid to ALE
negation.
1
(MIN = 1.00 x B1 -
2.00)
28.30
23.00
18.00
13.20
ns
P46
CLKOUT to REG valid (MAX =
0.25 x B1 + 8.00)
7.60
15.60
6.30
14.30
5.00
13.00
3.80
11.80
ns
P47
CLKOUT to REG Invalid. (MIN =
0.25 x B1 + 1.00)
8.60
7.30
6.00
4.80
ns
P48
CLKOUT to CE1, CE2 asserted.
(MAX = 0.25 x B1 + 8.00)
7.60
15.60
6.30
14.30
5.00
13.00
3.80
11.80
ns
P49
CLKOUT to CE1, CE2 negated.
(MAX = 0.25 x B1 + 8.00)
7.60
15.60
6.30
14.30
5.00
13.00
3.80
11.80
ns
P50
CLKOUT to PCOE, IORD, PCWE,
IOWR assert time. (MAX = 0.00 x
B1 + 11.00)
11.00
11.00
11.00
11.00
ns
P51
CLKOUT to PCOE, IORD, PCWE,
IOWR negate time. (MAX = 0.00 x
B1 + 11.00)
2.00
11.00
2.00
11.00
2.00
11.00
2.00
11.00
ns
P52
CLKOUT to ALE assert time
(MAX = 0.25 x B1 + 6.30)
7.60
13.80
6.30
12.50
5.00
11.30
3.80
10.00
ns
P53
CLKOUT to ALE negate time
(MAX = 0.25 x B1 + 8.00)
15.60
14.30
13.00
11.80
ns
P54
PCWE, IOWR negated to D(0:31)
invalid.
1
(MIN = 0.25 x B1 - 2.00)
5.60
4.30
3.00
1.80
ns
P55
WAITA and WAITB valid to
CLKOUT rising edge.
1
(MIN =
0.00 x B1 + 8.00)
8.00
8.00
8.00
8.00
ns
P56
CLKOUT rising edge to WAITA
and WAITB invalid.
1
(MIN = 0.00 x
B1 + 2.00)
2.00
2.00
2.00
2.00
ns
F
Freescale Semiconductor, Inc.
n
.
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