
Electrical Characteristics
20-6
MPC801 USER’S MANUAL
MOTOROLA
20
Table 20-1. Bus Operation Timing
NUM
CHARACTERISTIC
EXPRESSION
25 MHZ
40 MHZ
UNIT
MIN
MAX
MIN
MAX
B1
CLKOUT Period
TC
—
—
—
—
ns
B2
Clock Pulse Width Low
—
—
—
—
ns
B3
Clock Pulse Width High
—
—
—
—
ns
B4
CLKOUT Rise Time
—
—
—
—
ns
B5
CLKOUT Fall Time
—
—
—
—
ns
B6
Circuit Parameter TCC
9
—
6
—
ns
B7
CLKOUT To A(6:31), RD/WR, BURST, D(0:31),
DP(0:3) Invalid
0.25TC + 1
10
—
5
—
ns
B8
CLKOUT To TSIZ(0:1),RSV, AT(0:3),BDIP, PTR,
BADDR(28:30) Invalid
0.25TC + 1
10
—
5
—
ns
B9
CLKOUT To BR, BG, FRZ, VFLS(0:1), VF(0:2),
IWP(0:2), LWP(0:1), STS
Invalid
1
0.25TC + 1
10
—
5
—
ns
B10
CLKOUT To A(6:31), RD/WR, BURST, D(0:31),
DP(0:3) Valid
0.25TC + TCC
10
19
—
13
ns
B11
CLKOUT To TSIZ(0:1),RSV, AT(0:3), BDIP, PTR
Valid
0.25TC + TCC
10
19
—
13
ns
B12
CLKOUT To BR, BG, VFLS(0:1), VF(0:2), IWP(0:2),
FRZ, LWP(0:1), STS Valid.
0.25TC + TCC
10
19
—
13
ns
B13
CLKOUT To A(6:31), RD/WR, BURST, D(0:31),
TSIZ(0:1), RSV, AT(0:3), PTR Hi-Z
0.25TC + TCC
10
19
5
13
ns
B14
CLKOUT To TS, BB Assertion
0.25TC + TCC
10
19
5
13
ns
B15
CLKOUT To TA, BI Assertion (When Driven By The
Memory Controller)
—
11
—
10
ns
B16
CLKOUT To TS, BB Negation
0.25TC + TCC
10
19
5
13
ns
B17
CLKOUT To TA, BI Negation (When Driven By The
Memory Controller)
—
11
—
11
ns
B18
CLKOUT To TS, BB Hi-Z
0.25TC +14
10
24
5
21
ns
B19
CLKOUT To TA, BI Hi-Z (When Driven By The
Memory Controller)
—
15
—
15
ns
B20
CLKOUT To TEA Assertion
—
11
—
11
ns
B21
CLKOUT To TEA Hi-Z
—
15
—
15
ns
B22a
CLKOUT Falling Edge to CS Asserted-GPCM-
ACS=10, TRLX=0
TCC + 1
—
10
—
8
ns
B22b
CLKOUT Falling Edge to CS Asserted-GPCM-
ACS=11, TRLX=0, EBDF=1
0.25TC + TCC + 1
10
20
5
13
ns
B22c
CLKOUT Falling Edge to CS Asserted-GPCM-
ACS=11, TRLX=0, EBDF=1
0.375TC + TCC + 1
14
25
7
16
ns
B22
TA, BI, BB, BG, BR Valid To CLKOUT
(Setup Time)
9
—
7
—
ns