Bus Signal Timing
Table 10. Bus Operation Timings (continued)
33 MHz 40 MHz 66 MHz
Min Max Min Max Min Max Min Max
80 MHz
Num
Characteristic
Unit
B8
CLKOUT to A(0:31), BADDR(28:30)
RD/WR, BURST, D(0:31) valid
(MAX = 0.25 × B1 + 6.3)
—
13.80
—
12.50
—
10.00
—
9.43
ns
B8a CLKOUT to TSIZ(0:1), REG, RSV, BDIP,
—
—
13.80
13.80
—
—
12.50
12.50
—
—
10.00
10.00
—
—
9.43
9.43
ns
ns
PTR valid (MAX = 0.25 × B1 + 6.3)
B8b CLKOUT to BR, BG, VFLS(0:1), VF(0:2),
IWP(0:2), FRZ, LWP(0:1), STS valid 2
(MAX = 0.25 × B1 + 6.3)
B9
CLKOUT to A(0:31), BADDR(28:30),
RD/WR, BURST, D(0:31), TSIZ(0:1), REG,
RSV, PTR High-Z
7.60 13.80 6.30 12.50 3.80 10.00 3.13 9.43
ns
(MAX = 0.25 × B1 + 6.3)
B11 CLKOUT to TS, BB assertion
7.60 13.60 6.30 12.30 3.80 9.80 3.13 9.13
ns
ns
(MAX = 0.25 × B1 + 6.0)
B11a CLKOUT to TA, BI assertion (when driven 2.50 9.30 2.50 9.30 2.50 9.80
by the memory controller or PCMCIA
2.5
9.3
interface) (MAX = 0.00 × B1 + 9.30 1)
B12 CLKOUT to TS, BB negation
7.60 12.30 6.30 11.00 3.80 8.50 3.13 7.92
ns
ns
(MAX = 0.25 × B1 + 4.8)
B12a CLKOUT to TA, BI negation (when driven 2.50 9.00 2.50 9.00 2.50 9.00
by the memory controller or PCMCIA
2.5
9.00
interface) (MAX = 0.00 × B1 + 9.00)
B13 CLKOUT to TS, BB High-Z
7.60 21.60 6.30 20.30 3.80 14.00 3.13 12.93 ns
(MIN = 0.25 × B1)
B13a CLKOUT to TA, BI High-Z (when driven by 2.50 15.00 2.50 15.00 2.50 15.00 2.5 15.00 ns
the memory controller or PCMCIA
interface) (MIN = 0.00 × B1 + 2.5)
B14 CLKOUT to TEA assertion
2.50 9.00 2.50 9.00 2.50 9.00 2.50 9.00
ns
(MAX = 0.00 × B1 + 9.00)
B15 CLKOUT to TEA High-Z
2.50 15.00 2.50 15.00 2.50 15.00 2.50 15.00 ns
(MIN = 0.00 × B1 + 2.50)
B16 TA, BI valid to CLKOUT (setup time)
6.00
4.50
—
—
—
—
—
6.00
4.50
4.00
1.00
2.00
—
—
—
—
—
6.00
4.50
4.00
2.00
2.00
—
—
—
—
—
6
—
—
—
—
—
ns
ns
ns
ns
ns
(MIN = 0.00 × B1 + 6.00)
B16a TEA, KR, RETRY, CR valid to CLKOUT
4.50
4.00
2.00
2.00
(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
time) (MIN = 0.00 × B1 + 2.00)
MPC875/MPC870 Hardware Specifications, Rev. 3.0
17
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Freescale Semiconductor
FREESCALE [ Freescale ]
