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MOTOROLA
MPC860 Family Hardware Specifications
17
Bus Signal Timing
B29b CS negated to D(0:31), DP(0:3),
High-Z GPCM write access,
ACS = 00, TRLX = 0, and CSNT = 0
5.58
—
4.25
—
3.00
—
1.79
—
ns
B29c CS negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 0, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 0
13.15
—
10.5
—
8.00
—
5.58
—
ns
B29d WE(0:3) negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 1, CSNT = 1, EBDF = 0
43.45
—
35.5
—
28.00
—
20.73
—
ns
B29e CS negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 1, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 0
43.45
—
35.5
—
28.00
—
29.73
—
ns
B29f
WE(0:3) negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 0, CSNT = 1, EBDF = 1
8.86
—
6.88
—
5.00
—
3.18
—
ns
B29g CS negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 0, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 1
8.86
—
6.88
—
5.00
—
3.18
—
ns
B29h WE(0:3) negated to D(0:31), DP(0:3)
High-Z GPCM write access,
TRLX = 1, CSNT = 1, EBDF = 1
38.67
—
31.38
—
24.50
—
17.83
—
ns
B29i
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
38.67
—
31.38
—
24.50
—
17.83
—
ns
B30
CS, WE(0:3) negated to A(0:31),
BADDR(28:30) invalid GPCM write
access
8
5.58
—
4.25
—
3.00
—
1.79
—
ns
B30a WE(0:3) negated to A(0:31),
BADDR(28:30) invalid GPCM, write
access, TRLX = 0, CSNT = 1,
CS negated to A(0:31) invalid GPCM
write access, TRLX = 0, CSNT =1
ACS = 10, or ACS = 11, EBDF = 0
13.15
—
10.50
—
8.00
—
5.58
—
ns
B30b WE(0:3) negated to A(0:31),
invalid GPCM BADDR(28:30) invalid
GPCM write access, TRLX = 1,
CSNT = 1. CS negated to A(0:31),
Invalid GPCM, write access,
TRLX = 1, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 0
43.45
—
35.50
—
28.00
—
20.73
—
ns
Table 9-6. Bus Operation Timings (continued)
Num
Characteristic
33 MHz
40 MHz
50 MHz
66 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max