Bus Signal Timing
Table 9. Bus Operation Timings (continued)
33 MHz 40 MHz
Min Max Min Max Min Max Min Max
4.50
66 MHz
80 MHz
Num
Characteristic
Unit
B16a TEA, KR, RETRY, CR valid to CLKOUT
—
—
—
—
—
—
—
—
4.50
4.00
1.00
2.00
6.00
1.00
4.00
2.00
—
—
—
—
—
—
—
—
4.50
4.00
2.00
2.00
6.00
2.00
4.00
2.00
—
—
—
—
—
—
—
—
4.50
4.00
2.00
2.00
6.00
2.00
4.00
2.00
—
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(setup time) (MIN = 0.00 × B1 + 4.5)
B16b BB, BG, BR, valid to CLKOUT (setup time) 4.00
2 (4MIN = 0.00 × B1 + 0.00)
B17 CLKOUT to TA, TEA, BI, BB, BG, BR valid 1.00
(hold time) (MIN = 0.00 × B1 + 1.00 3)
B17a CLKOUT to KR, RETRY, CR valid (hold
2.00
6.00
time) (MIN = 0.00 × B1 + 2.00)
B18 D(0:31) valid to CLKOUT rising edge
(setup time) 4 (MIN = 0.00 × B1 + 6.00)
B19 CLKOUT rising edge to D(0:31) valid (hold 1.00
time) 4 (MIN = 0.00 × B1 + 1.00 5)
B20 D(0:31) valid to CLKOUT falling edge
4.00
2.00
(setup time) 6 (MIN = 0.00 × B1 + 4.00)
B21 CLKOUT falling edge to D(0:31) valid
(hold time) 6 (MIN = 0.00 × B1 + 2.00)
B22 CLKOUT rising edge to CS asserted
7.60 13.80 6.30 12.50 3.80 10.00 3.13 9.43
GPCM ACS = 00 (MAX = 0.25 × B1 + 6.3)
B22a CLKOUT falling edge to CS asserted
GPCM ACS = 10, TRLX = 0
—
8.00
—
8.00
—
8.00
—
8.00
(MAX = 0.00 × B1 + 8.00)
B22b CLKOUT falling edge to CS asserted
GPCM ACS = 11, TRLX = 0, 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, 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, TRLX = 0 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
13.20
—
—
—
4.30
10.50
—
—
—
1.80
5.60
—
—
—
1.13
4.25
—
—
—
ns
ns
B24a A(0:31) and BADDR(28:30) to CS
asserted GPCM ACS = 11 TRLX = 0
(MIN = 0.50 × B1 – 2.00)
B25 CLKOUT rising edge to OE, WE(0:3)
9.00
9.00
9.00
9.00
ns
ns
asserted (MAX = 0.00 × B1 + 9.00)
B26 CLKOUT rising edge to OE negated
2.00 9.00 2.00 9.00 2.00 9.00 2.00 9.00
(MAX = 0.00 × B1 + 9.00)
MPC885/MPC880 Hardware Specifications, Rev. 3
18
Freescale Semiconductor
FREESCALE [ Freescale ]
