mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 15

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

MOTOROLA
B30b WE[0–3] negated to A[6–31]
B30c WE[0–3] negated to A[6–31]
B30d WE[0–3] negated to A[6–31]
B31a CLKOUT falling edge to CS valid
B31b CLKOUT rising edge to CS valid
B31c CLKOUT rising edge to CS valid
B31d CLKOUT falling edge to CS valid
B32a CLKOUT falling edge to BS valid
Num
B31
B32
invalid
GPCM write access, TRLX = 1,
CSNT = 1. CS negated to
A[6–31] Invalid GPCM write
access TRLX = 1, CSNT = 1,
ACS = 10 or ACS = 11, EBDF = 0
invalid
GPCM write access, TRLX = 0,
CSNT = 1. CS negated to
A[6–31] invalid GPCM write
access, TRLX = 0, CSNT = 1,
ACS = 10 or ACS = 11, EBDF = 1
invalid GPCM write access TRLX
= 1, CSNT =1, CS negated to
A[6–31] invalid GPCM write
access TRLX = 1, CSNT = 1,
ACS = 10 or ACS = 11, EBDF = 1
CLKOUT falling edge 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 control bit
CST2 in the corresponding word
in the UPM
- as requested by control bit
CST3 in the corresponding word
in the UPM
- as requested by control bit
CST1 in the corresponding word
in the UPM EBDF = 1
CLKOUT falling edge to BS valid
- as requested by control bit
BST4 in the corresponding word
in the UPM
- as requested by control bit
BST1 in the corresponding word
in the UPM, EBDF = 0
Characteristic
MPC850 (Rev. A/B/C) Hardware Specifications
Table 6. Bus Operation Timing
28.00
25.00
5.00
1.50
5.00
1.50
5.00
9.00
1.50
5.00
Min
50 MHz
12.00
12.00
14.00 13.00 18.00 11.00 16.00
12.00
Max
6.00
8.00
6.00
—
—
—
43.00
39.00
8.00
1.50
8.00
1.50
8.00
1.50
8.00
Min
66 MHz
14.00
14.00
14.00
Max
6.00
8.00
6.00
—
—
—
1
(continued)
36.00
31.00
6.00
1.50
6.00
1.50
6.00
1.50
6.00
Min
80 MHz
13.00
13.00
13.00
Max
6.00
8.00
6.00
—
—
—
FFACT
1.500
0.375
1.375
0.250
0.250
0.375
0.250
—
—
—
Layout Practices
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
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
15