MPC857T Freescale Semiconductor, Inc, MPC857T Datasheet - Page 21

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

Freescale Semiconductor
B30d WE(0:3) negated to A(0:31),
B31a CLKOUT falling edge to CS valid - as
B31b CLKOUT rising edge to CS valid - as
B31d CLKOUT falling edge to CS valid, as
B32a CLKOUT falling edge to BS valid - as
B32b CLKOUT rising edge to BS valid - as
Num
B30c WE(0:3) negated to A(0:31),
B31c CLKOUT rising edge to CS valid- as
B31 CLKOUT falling edge to CS valid - as
B32 CLKOUT falling edge to BS valid- as
BADDR(28:30) invalid GPCM write
access, TRLX = 0, CSNT = 1.
CS negated to A(0:31) invalid GPCM
write access, TRLX = 0, CSNT = 1
ACS = 10, ACS == 11, EBDF = 1
(MIN = 0.375 x B1 - 3.00)
BADDR(28:30) invalid GPCM write
access TRLX = 1, CSNT =1,
CS negated to A(0:31) invalid GPCM
write access TRLX = 1, CSNT = 1,
ACS = 10 or 11, EBDF = 1
requested by control bit CST4 in the
corresponding word in the UPM
(MAX = 0.00 X B1 + 6.00)
requested by control bit CST1 in the
corresponding word in the UPM
(MAX = 0.25 x B1 + 6.80)
requested by control bit CST2 in the
corresponding word in the UPM
(MAX = 0.00 x B1 + 8.00)
requested by control bit CST3 in the
corresponding word in the UPM
(MAX = 0.25 x B1 + 6.30)
requested by control bit CST1 in the
corresponding word in the UPM
EBDF = 1 (MAX = 0.375 x B1 + 6.6)
requested by control bit BST4 in the
corresponding word in the UPM
(MAX = 0.00 x B1 + 6.00)
requested by control bit BST1 in the
corresponding word in the UPM,
EBDF = 0 (MAX = 0.25 x B1 + 6.80)
requested by control bit BST2 in the
corresponding word in the UPM
(MAX = 0.00 x B1 + 8.00)
MPC862/857T/857DSL PowerQUICC™ Family Hardware Specifications, Rev. 3
Characteristic
Table 7. Bus Operation Timings (continued)
38.67
8.40
1.50
7.60
1.50
7.60
9.40
1.50
7.60
1.50
Min
33 MHz
14.30
13.80
18.00
14.30
Max
6.00
8.00
6.00
8.00
—
—
31.38
6.40
1.50
6.30
1.50
6.30
7.60
1.50
6.30
1.50
Min
40 MHz
13.00
12.50
16.00
13.00
Max
6.00
8.00
6.00
8.00
—
—
24.50
13.30
4.50
1.50
5.00
1.50
5.00
1.50
5.00
1.50
Min
50 MHz
11.80
11.30
14.10
11.80
Max
6.00
8.00
6.00
8.00
—
—
17.83
11.30
2.70
1.50
3.80
1.50
3.80
1.50
3.80
1.50
Min
66 MHz
Bus Signal Timing
10.50
10.00
12.30
10.50
Max
6.00
8.00
6.00
8.00
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
21