MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
22
Freescale Semiconductor
Bus Signal Timing
B32
CLKOUT falling edge to BS valid, as requested by
control bit BST4 in the corresponding word in the
UPM (MAX = 0.00
× B1 + 6.00)
1.50
6.00
1.50
6.00
1.50
6.00
1.50
6.00
ns
B32a
CLKOUT falling edge to BS valid, as requested by
control bit BST1 in the corresponding word in the
UPM, EBDF = 0 (MAX = 0.25
× B1 + 6.80)
7.60
14.30
6.30
13.00
3.80
10.50
3.13
10.00
ns
B32b
CLKOUT rising edge to BS valid, as requested by
control bit BST2 in the corresponding word in the
UPM (MAX = 0.00
× B1 + 8.00)
1.50
8.00
1.50
8.00
1.50
8.00
1.50
8.00
ns
B32c
CLKOUT rising edge to BS valid, as requested by
control bit BST3 in the corresponding word in the
UPM (MAX = 0.25
× B1 + 6.80)
7.60
14.30
6.30
13.00
3.80
10.50
3.13
10.00
ns
B32d
CLKOUT falling edge to BS valid, as requested by
control bit BST1 in the corresponding word in the
UPM, EBDF = 1 (MAX = 0.375
× B1 + 6.60)
13.30 18.00 11.30 16.00
7.60
12.30
4.49
11.30
ns
B33
CLKOUT falling edge to GPL valid, as requested
by control bit GxT4 in the corresponding word in
the UPM (MAX = 0.00
× B1 + 6.00)
1.50
6.00
1.50
6.00
1.50
6.00
1.50
6.00
ns
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)
7.60
14.30
6.30
13.00
3.80
10.50
3.13
10.00
ns
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
—
4.30
—
1.80
—
1.13
—
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)
13.20
—
10.50
—
5.60
—
4.25
—
ns
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)
20.70
—
16.70
—
9.40
—
6.80
—
ns
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)
5.60
—
4.30
—
1.80
—
1.13
—
ns
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 (MIN = 0.50
× B1–2.00)
13.20
—
10.50
—
5.60
—
4.25
—
ns
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)
20.70
—
16.70
—
9.40
—
7.40
—
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