mpc880 Freescale Semiconductor, Inc, mpc880 Datasheet - Page 21

• Manufacturer Part Number: mpc880
• Description: Mpc885 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
B30a
B30b
B30d
B31a
B31b
B31d
Num
B30c
B31c
B29i
B30
B31
B32
CS negated to D(0:31) High-Z GPCM write
access, TRLX = 1, CSNT = 1, ACS = 10 or
ACS = 11, EBDF = 1 (MIN = 0.375 × B1 – 3.30)
CS, WE(0:3) negated to A(0:31), BADDR(28:30)
Invalid GPCM write access
(MIN = 0.25 × B1 – .00)
WE(0:3) negated to A(0:31), 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, or ACS == 11,
EBDF = 0 (MIN = 0.50 × B1 – 2.00)
WE(0:3) negated to A(0:31) invalid GPCM
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 ACS == 11 EBDF = 0
(MIN = 1.50 × B1 – 2.00)
WE(0:3) negated to A(0:31), 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 × B1 – 3.00)
WE(0:3) negated to A(0:31), 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
CLKOUT falling edge to CS valid, as requested by
control bit CST4 in the corresponding word in the
UPM (MAX = 0.00 × B1 + 6.00)
CLKOUT falling edge to CS valid, as requested by
control bit CST1 in the corresponding word in the
UPM (MAX = 0.25 × B1 + 6.80)
CLKOUT rising edge to CS valid, as requested by
control bit CST2 in the corresponding word in the
UPM (MAX = 0.00 × B1 + 8.00)
CLKOUT rising edge to CS valid, as requested by
control bit CST3 in the corresponding word in the
UPM (MAX = 0.25 × B1 + 6.30)
CLKOUT falling edge to CS valid, as requested by
control bit CST1 in the corresponding word in the
UPM EBDF = 1 (MAX = 0.375 × B1 + 6.6)
CLKOUT falling edge to BS valid, as requested by
control bit BST4 in the corresponding word in the
UPM (MAX = 0.00 × B1 + 6.00)
MPC885/MPC880 PowerQUICC™ Hardware Specifications, Rev. 4
Characteristic
Table 9. Bus Operation Timings (continued)
8
38.40
13.20
43.50
38.67
13.30 18.00 11.30 16.00 7.60 12.30 4.69 11.30
5.60
8.40
1.50
7.60 14.30 6.30 13.00 3.80 10.50 3.13 10.00
1.50
7.60 13.80 6.30 12.50 3.80 10.00 3.13
1.50
Min
33 MHz
Max
6.00
8.00
6.00
—
—
—
—
—
—
31.10
10.50
35.50
31.38
4.30
6.40
1.50
1.50
1.50
Min
40 MHz
Max
6.00
8.00
6.00
—
—
—
—
—
—
17.50
20.70
17.83
1.80
5.60
2.70
1.50
1.50
1.50
Min
66 MHz
Max
6.00
8.00
6.00
—
—
—
—
—
—
13.85
16.75
14.19
1.13
4.25
1.70
1.50
1.50
1.50
Min
80 MHz
Bus Signal Timing
Max
6.00
8.00
9.40
6.00
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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