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14
MPC860 Family Hardware Specifications
MOTOROLA
Bus Signal Timing
The timing for the MPC860 bus shown assumes a 50-pF load for maximum delays and a
0-pF load for minimum delays.
Table 9-6. Bus Operation Timings
Num
Characteristic
33 MHz
40 MHz
50 MHz
66 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
B1
CLKOUT period
30.30
30.30
25.00
30.30
20.00
30.30
15.15
30.30
ns
B1a
EXTCLK to CLKOUT phase skew
(EXTCLK > 15 MHz and MF <= 2)
–0.90
0.90
–0.90
0.90
–0.90
0.90
–0.90
0.90
ns
B1b
EXTCLK to CLKOUT phase skew
(EXTCLK > 10 MHz and MF < 10)
–2.30
2.30
–2.30
2.30
–2.30
2.30
–2.30
2.30
ns
B1c
CLKOUT phase jitter (EXTCLK >
15 MHz and MF <= 2)
1
–0.60
0.60
–0.60
0.60
–0.60
0.60
–0.60
0.60
ns
B1d
CLKOUT phase jitter
1
–2.00
2.00
–2.00
2.00
–2.00
2.00
–2.00
2.00
ns
B1e
CLKOUT frequency jitter (MF < 10)
1
—
0.50
—
0.50
—
0.50
—
0.50
%
B1f
CLKOUT frequency jitter (10 < MF
< 500)
1
—
2.00
—
2.00
—
2.00
—
2.00
%
B1g
CLKOUT frequency jitter (MF > 500)
1
—
3.00
—
3.00
—
3.00
—
3.00
%
B1h
Frequency jitter on EXTCLK
2
—
0.50
—
0.50
—
0.50
—
0.50
%
B2
CLKOUT pulse width low
12.12
—
10.00
—
8.00
—
6.06
—
ns
B3
CLKOUT width high
12.12
—
10.00
—
8.00
—
6.06
—
ns
B4
CLKOUT rise time
3
—
4.00
—
4.00
—
4.00
—
4.00
ns
B5
33
CLKOUT fall time
3
—
4.00
—
4.00
—
4.00
—
4.00
ns
B7
CLKOUT to A(0:31), BADDR(28:30),
RD/WR, BURST, D(0:31), DP(0:3)
invalid
7.58
—
6.25
—
5.00
—
3.80
—
ns
B7a
CLKOUT to TSIZ(0:1), REG, RSV,
AT(0:3), BDIP, PTR invalid
7.58
—
6.25
—
5.00
—
3.80
—
ns
B7b
CLKOUT to BR, BG, FRZ, VFLS(0:1),
VF(0:2) IWP(0:2), LWP(0:1), STS
invalid
4
7.58
—
6.25
—
5.00
—
3.80
—
ns
B8
CLKOUT to A(0:31), BADDR(28:30)
RD/WR, BURST, D(0:31), DP(0:3)
valid
7.58
14.33
6.25
13.00
5.00
11.75
3.80
10.04
ns
B8a
CLKOUT to TSIZ(0:1), REG, RSV,
AT(0:3) BDIP, PTR valid
7.58
14.33
6.25
13.00
5.00
11.75
3.80
10.04
ns
B8b
CLKOUT to BR, BG, VFLS(0:1),
VF(0:2), IWP(0:2), FRZ, LWP(0:1),
STS valid
4
7.58
14.33
6.25
13.00
5.00
11.75
3.80
10.04
ns
B9
CLKOUT to A(0:31), BADDR(28:30),
RD/WR, BURST, D(0:31), DP(0:3),
TSIZ(0:1), REG, RSV, AT(0:3), PTR
High-Z
7.58
14.33
6.25
13.00
5.00
11.75
3.80
10.04
ns