Bus Signal Timing
Table 10. Bus Operation Timings (continued)
33 MHz 40 MHz 66 MHz
Min Max Min Max Min Max Min Max
7.60 14.30 6.30 13.00 3.80 10.50 3.13 10.00 ns
80 MHz
Num
Characteristic
Unit
B33a CLKOUT rising edge to GPL valid, as
requested by control bit GxT3 in the
corresponding word in the UPM
(MAX = 0.25 × B1 + 6.80)
B34 A(0:31), BADDR(28:30), and D(0:31) to
CS valid, as requested by control bit CST4
in the corresponding word in the UPM
(MIN = 0.25 × B1 - 2.00)
5.60
13.20
20.70
5.60
—
—
—
—
—
—
—
4.30
10.50
16.70
4.30
—
—
—
—
—
—
—
1.80
5.60
9.40
1.80
5.60
9.40
1.80
—
—
—
—
—
—
—
1.13
4.25
6.80
1.13
4.25
7.40
1.13
—
—
—
—
—
—
—
ns
ns
ns
ns
ns
ns
ns
B34a A(0:31), BADDR(28:30), and D(0:31) to
CS valid, as requested by control bit CST1
in the corresponding word in the UPM
(MIN = 0.50 × B1 – 2.00)
B34b A(0:31), BADDR(28:30), and D(0:31) to
CS valid, as requested by CST2 in the
corresponding word in UPM
(MIN = 0.75 × B1 – 2.00)
B35 A(0:31), BADDR(28:30) to CS valid, as
requested by control bit BST4 in the
corresponding word in the UPM
(MIN = 0.25 × B1 – 2.00)
B35a A(0:31), BADDR(28:30), and D(0:31) to
BS valid, as requested by BST1 in the
corresponding word in the UPM
13.20
20.70
5.60
10.50
16.70
4.30
(MIN = 0.50 × B1 – 2.00)
B35b A(0:31), BADDR(28:30), and D(0:31) to
BS valid, as requested by control bit BST2
in the corresponding word in the UPM
(MIN = 0.75 × B1 – 2.00)
B36 A(0:31), BADDR(28:30), and D(0:31) to
GPL valid, as requested by control bit
GxT4 in the corresponding word in the
UPM (MIN = 0.25 × B1 – 2.00)
8
B37 UPWAIT valid to CLKOUT falling edge
6.00
1.00
7.00
—
—
—
—
6.00
1.00
7.00
7.00
—
—
—
—
6.00
1.00
7.00
7.00
—
—
—
—
6.00
1.00
7.00
7.00
—
—
—
—
ns
ns
ns
ns
(MIN = 0.00 × B1 + 6.00)
B38 CLKOUT falling edge to UPWAIT valid 8
(MIN = 0.00 × B1 + 1.00)
B39 AS valid to CLKOUT rising edge 9
(MIN = 0.00 × B1 + 7.00)
B40 A(0:31), TSIZ(0:1), RD/WR, BURST, valid 7.00
to CLKOUT rising edge
(MIN = 0.00 × B1 + 7.00)
B41 TS valid to CLKOUT rising edge (setup
7.00
—
7.00
—
7.00
—
7.00
—
ns
time) (MIN = 0.00 × B1 + 7.00)
MPC875/MPC870 Hardware Specifications, Rev. 3.0
22
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Freescale Semiconductor
FREESCALE [ Freescale ]
