mpc880 Freescale Semiconductor, Inc, mpc880 Datasheet - Page 20

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

Bus Signal Timing
20
B28a
B28b
B28d
B29a
B29b
B29d
B29e
B29g
B29h
Num
B28c
B29c
B29f
B28
B29
CLKOUT rising edge to WE(0:3) negated GPCM
write access CSNT = 0 (MAX = 0.00 × B1 + 9.00)
CLKOUT falling edge to WE(0:3) negated GPCM
write access TRLX = 0, CSNT = 1, EBDF = 0
(MAX = 0.25 × B1 + 6.80)
CLKOUT falling edge to CS negated GPCM write
access TRLX = 0, CSNT = 1 ACS = 10 or
ACS = 11, EBDF = 0 (MAX = 0.25 × B1 + 6.80)
CLKOUT falling edge to WE(0:3) negated GPCM
write access TRLX = 0, CSNT = 1 write access
TRLX = 0, CSNT = 1, EBDF = 1
(MAX = 0.375 × B1 + 6.6)
CLKOUT falling edge to CS negated GPCM write
access TRLX = 0, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 1 (MAX = 0.375 × B1 + 6.6)
WE(0:3) negated to D(0:31) High-Z GPCM write
access, CSNT = 0, EBDF = 0
(MIN = 0.25 × B1 – 2.00)
WE(0:3) negated to D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1, EBDF = 0
(MIN = 0.50 × B1 – 2.00)
CS negated to D(0:31) High-Z GPCM write
access, ACS = 00, TRLX = 0 & CSNT = 0
(MIN = 0.25 × B1 – 2.00)
CS negated to D(0:31) High-Z 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 D(0:31) High-Z GPCM write
access, TRLX = 1, CSNT = 1, EBDF = 0
(MIN = 1.50 × B1 – 2.00)
CS negated to D(0:31) High-Z 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 D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1, EBDF = 1
(MIN = 0.375 × B1 – 6.30)
CS negated to D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1 ACS = 10 or
ACS = 11, EBDF = 1 (MIN = 0.375 × B1 – 6.30)
WE(0:3) negated to D(0:31) High-Z GPCM write
access, TRLX = 1, CSNT = 1, EBDF = 1
(MIN = 0.375 × B1 – 3.30)
MPC885/MPC880 PowerQUICC™ Hardware Specifications, Rev. 4
Characteristic
Table 9. Bus Operation Timings (continued)
7
7
10.90 18.00 10.90 18.00 5.20 12.30 4.69 11.29
13.20
13.20
43.50
43.50
38.40
7.60 14.30 6.30 13.00 3.80 10.50 3.13
5.60
5.60
5.00
5.00
Min
—
—
—
33 MHz
14.30
18.00
Max
9.00
—
—
—
—
—
—
—
—
—
10.50
10.50
35.50
35.50
31.10
4.30
4.30
3.00
3.00
Min
—
—
—
40 MHz
13.00
18.00
Max
9.00
—
—
—
—
—
—
—
—
—
20.70
20.70
17.50
1.80
5.60
1.80
5.60
0.00
0.00
Min
—
—
—
66 MHz
10.50
12.30
Max
9.00
—
—
—
—
—
—
—
—
—
Freescale Semiconductor
16.75
16.75
13.85
1.13
4.25
1.13
4.25
0.00
0.00
Min
—
—
—
80 MHz
11.30
Max
9.00
9.93
9.93
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns