MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
Freescale Semiconductor
19
Bus Signal Timing
B16b
BB, BG, BR, valid to CLKOUT (setup time)2
(4MIN = 0.00
× B1 + 0.00)
4.00
—
4.00
—
4.00
—
4.00
—
ns
B17
CLKOUT to TA, TEA, BI, BB, BG, BR valid (hold
time) (MIN = 0.00
× B1 + 1.003)
1.00
—
1.00
—
2.00
—
2.00
—
ns
B17a
CLKOUT to KR, RETRY, CR valid (hold time)
(MIN = 0.00
× B1 + 2.00)
2.00
—
2.00
—
2.00
—
2.00
—
ns
B18
D(0:31) valid to CLKOUT rising edge (setup time)4
(MIN = 0.00
× B1 + 6.00)
6.00
—
6.00
—
6.00
—
6.00
—
ns
B19
CLKOUT rising edge to D(0:31) valid (hold time)
4(MIN = 0.00
× B1 + 1.005)
1.00
—
1.00
—
2.00
—
2.00
—
ns
B20
D(0:31) valid to CLKOUT falling edge (setup
time)6 (MIN = 0.00
× B1 + 4.00)
4.00
—
4.00
—
4.00
—
4.00
—
ns
B21
CLKOUT falling edge to D(0:31) valid (hold time)
6(MIN = 0.00
× B1 + 2.00)
2.00
—
2.00
—
2.00
—
2.00
—
ns
B22
CLKOUT rising edge to CS asserted GPCM
ACS = 00 (MAX = 0.25
× B1 + 6.3)
7.60
13.80
6.30
12.50
3.80
10.00
3.13
9.43
ns
B22a
CLKOUT falling edge to CS asserted GPCM
ACS = 10, TRLX = [0 or 1]
(MAX = 0.00
× B1 + 8.00)
—
8.00
—
8.00
—
8.00
—
8.00
ns
B22b
CLKOUT falling edge to CS asserted GPCM
ACS = 11, TRLX = [0 or 1], EBDF = 0
(MAX = 0.25
× B1 + 6.3)
7.60
13.80
6.30
12.50
3.80
10.00
3.13
9.43
ns
B22c
CLKOUT falling edge to CS asserted GPCM
ACS = 11, TRLX = [0 or 1], EBDF = 1
(MAX = 0.375
× B1 + 6.6)
10.90 18.00 10.90 16.00
5.20
12.30
4.69
10.93
ns
B23
CLKOUT rising edge to CS negated GPCM read
access, GPCM write access ACS = 00 and CSNT
= 0 (MAX = 0.00
× B1 + 8.00)
2.00
8.00
2.00
8.00
2.00
8.00
2.00
8.00
ns
B24
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 10, TRLX = 0
(MIN = 0.25
× B1 – 2.00)
5.60
—
4.30
—
1.80
—
1.13
—
ns
B24a
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 11 TRLX = 0
(MIN = 0.50
× B1 – 2.00)
13.20
—
10.50
—
5.60
—
4.25
—
ns
B25
CLKOUT rising edge to OE, WE(0:3) asserted
(MAX = 0.00
× B1 + 9.00)
—
9.00
—
9.00
—
9.00
—
9.00
ns
B26
CLKOUT rising edge to OE negated
(MAX = 0.00
× B1 + 9.00)
2.00
9.00
2.00
9.00
2.00
9.00
2.00
9.00
ns
B27
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 10, TRLX = 1
(MIN = 1.25
× B1 – 2.00)
35.90
—
29.30
—
16.90
—
13.60
—
ns
Table 9. Bus Operation Timings (continued)
Num
Characteristic
33 MHz
40 MHz
66 MHz
80 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max