mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 14

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

Layout Practices
14
B29b CS negated to D[0–31], DP[0–3],
B29c CS negated to D[0–31], DP[0–3]
B29d WE[0–3] negated to D[0–31],
B29e CS negated to D[0–31], DP[0–3]
B29g CS negated to D[0–31], DP[0–3]
B29h WE[0–3] negated to D[0–31],
B30a WE[0–3] negated to A[6–31]
Num
B29f
B29i
B30
high-Z GPCM write access, ACS
= 00, TRLX = 0 & CSNT = 0
high-Z GPCM write access,
TRLX = 0, CSNT = 1, ACS = 10
or ACS = 11, EBDF = 0
DP[0–3] high-Z GPCM write
access, TRLX = 1, CSNT = 1,
EBDF = 0
high-Z GPCM write access,
TRLX = 1, CSNT = 1, ACS = 10
or ACS = 11, EBDF = 0
WE[0–3] negated to D[0–31],
DP[0–3] high-Z GPCM write
access TRLX = 0, CSNT = 1,
EBDF = 1
high-Z GPCM write access TRLX
= 0, CSNT = 1, ACS = 10 or ACS
= 11, EBDF = 1
DP[0–3] high-Z GPCM write
access TRLX = 0, CSNT = 1,
EBDF = 1
CS negated to D[0–31], DP[0–3]
high-Z GPCM write access,
TRLX = 1, CSNT = 1, ACS = 10
or ACS = 11, EBDF = 1
CS, WE[0–3] negated to A[6–31]
invalid
GPCM write access
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 = 0
Characteristic
9
MPC850 (Rev. A/B/C) Hardware Specifications
Table 6. Bus Operation Timing
28.00
28.00
25.00
25.00
3.00
8.00
5.00
5.00
3.00
8.00
Min
50 MHz
Max
—
—
—
—
—
—
—
—
—
—
13.00
43.00
43.00
39.00
39.00
13.00
6.00
9.00
9.00
6.00
Min
66 MHz
Max
—
—
—
—
—
—
—
—
—
—
1
(continued)
11.00
36.00
36.00
31.00
31.00
11.00
4.00
7.00
7.00
4.00
Min
80 MHz
Max
—
—
—
—
—
—
—
—
—
—
FFACT
0.250
0.500
1.500
1.500
0.375
0.375
1.375
1.375
0.250
0.500
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
MOTOROLA
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns