mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 16

• Manufacturer Part Number: mpc850de
• Description: Mpc850 Rev. A/b/c Communications Controller
• Manufacturer: Freescale Semiconductor, Inc

Layout Practices
16
B32b CLKOUT rising edge to BS valid
B32c CLKOUT rising edge to BS valid
B32d CLKOUT falling edge to BS valid
B33a CLKOUT rising edge to GPL
B34a A[6–31] and D[0–31] to CS valid
B34b A[6–31] and D[0–31] to CS valid
B35a A[6–31] and D[0–31] to BS valid
B35b A[6–31] and D[0–31] to BS valid
Num
B33
B34
B35
B36
- as requested by control bit
BST2 in the corresponding word
in the UPM
- as requested by control bit
BST3 in the corresponding word
in the UPM
- as requested by control bit
BST1 in the corresponding word
in the UPM, EBDF = 1
CLKOUT falling edge to GPL
valid - as requested by control bit
GxT4 in the corresponding word
in the UPM
valid - as requested by control bit
GxT3 in the corresponding word
in the UPM
A[6–31] and D[0–31] to CS valid
- as requested by control bit
CST4 in the corresponding word
in the UPM
- as requested by control bit
CST1 in the corresponding word
in the UPM
- as requested by CST2 in the
corresponding word in UPM
A[6–31] to CS valid - as
requested by control bit BST4 in
the corresponding word in UPM
- as requested by BST1 in the
corresponding word in the UPM
- as requested by control bit
BST2 in the corresponding word
in the UPM
A[6–31] and D[0–31] to GPL
valid - as requested by control bit
GxT4 in the corresponding word
in the UPM
Characteristic
MPC850 (Rev. A/B/C) Hardware Specifications
Table 6. Bus Operation Timing
13.00
13.00
1.50
5.00
9.00
1.50
5.00
3.00
8.00
3.00
8.00
3.00
Min
50 MHz
12.00
14.00 13.00 18.00 11.00 16.00
12.00
Max
8.00
6.00
—
—
—
—
—
—
—
13.00
21.00
13.00
21.00
1.50
8.00
1.50
8.00
6.00
6.00
6.00
Min
66 MHz
14.00
14.00
Max
8.00
6.00
—
—
—
—
—
—
—
1
(continued)
11.00
17.00
11.00
17.00
1.50
6.00
1.50
6.00
4.00
4.00
4.00
Min
80 MHz
13.00
13.00
Max
8.00
6.00
—
—
—
—
—
—
—
FFACT
0.250
0.375
0.250
0.250
0.500
0.750
0.250
0.500
0.750
0.250
—
—
Cap Load
(default
50 pF)
50.00
50.00
50.00
50.00
50.00
50.00
50.00
50.00
50.00
50.00
50.00
50.00
MOTOROLA
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns