MPC870 FREESCALE [Freescale Semiconductor, Inc], MPC870 Datasheet - Page 16

• Manufacturer Part Number: MPC870
• Description: Hardware Specifications
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Bus Signal Timing
Table 10
The timing for the MPC875/870 bus shown assumes a 50-pF load for maximum delays and a 0-pF load for minimum
delays. CLKOUT assumes a 100-pF load maximum delay
16
Core frequency
Bus frequency
Num
B1a
B1b
B1c
B1d
B7a
B7b
B1
B2
B3
B4
B5
B7
provides the bus operation timing for the MPC875/870 at 33, 40, 66, and 80 MHz.
Bus period (CLKOUT), see
EXTCLK to CLKOUT phase skew - If
CLKOUT is an integer multiple of
EXTCLK, then the rising edge of EXTCLK
is aligned with the rising edge of CLKOUT.
For a non-integer multiple of EXTCLK, this
synchronization is lost, and the rising
edges of EXTCLK and CLKOUT have a
continuously varying phase skew.
CLKOUT frequency jitter peak-to-peak
Frequency jitter on EXTCLK
CLKOUT phase jitter peak-to-peak
for OSCLK ≥ 15 MHz
CLKOUT phase jitter peak-to-peak
for OSCLK < 15 MHz
CLKOUT pulse width low
(MIN = 0.4
CLKOUT pulse width high
(MIN = 0.4
CLKOUT rise time
CLKOUT fall time
CLKOUT to A(0:31), BADDR(28:30),
RD/WR, BURST, D(0:31) output hold
(MIN = 0.25
CLKOUT to TSIZ(0:1), REG, RSV, BDIP,
PTR output hold (MIN = 0.25
CLKOUT to BR, BG, FRZ, VFLS(0:1),
VF(0:2) IWP(0:2), LWP(0:1), STS output
hold (MIN = 0.25
Table 9. Frequency Ranges for Standard Part Frequencies (2:1 Bus Mode)
Part Frequency
×
×
×
B1, MAX = 0.6
B1, MAX = 0.6
Characteristic
B1)
×
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
B1)
MPC875/MPC870 Hardware Specifications, Rev. 3.0
Table 8
×
×
×
Table 10. Bus Operation Timings
B1)
B1)
B1)
12.1
12.1
7.60
7.60
7.60
Min
–2
—
—
—
—
—
—
—
33 MHz
Min
40
20
66 MHz
Max
18.2
18.2
4.00
4.00
0.50
+2
—
—
—
—
1
4
5
66.67
33.33
Max
10.0
10.0
6.30
6.30
6.30
Min
–2
—
—
—
—
—
—
—
40 MHz
Max
0.50
15.0
15.0
4.00
4.00
+2
—
—
—
—
1
4
5
Min
40
20
80 MHz
3.80
3.80
3.80
Min
6.1
6.1
–2
—
—
—
—
—
—
—
66 MHz
Max
80
40
Max
0.50
4.00
4.00
9.1
9.1
+2
—
—
—
—
1
4
5
Freescale Semiconductor
3.13
3.13
3.13
Min
5.0
5.0
–2
—
—
—
—
—
—
—
80 MHz
Min
40
20
133 MHz
Max
0.50
4.00
4.00
7.5
7.5
+2
—
—
—
—
1
4
5
Max
133
66
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%