mpc850de Freescale Semiconductor, Inc, mpc850de Datasheet - Page 12

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

Layout Practices
12
B11a CLKOUT to TA, BI assertion,
B12a CLKOUT to TA, BI negation
B13a CLKOUT to TA, BI high-Z, (when
B16a TEA, KR, RETRY, valid to
B16b BB, BG, BR valid to CLKOUT
B17a CLKOUT to KR, RETRY, except
B22a CLKOUT falling edge to CS
B22b CLKOUT falling edge to CS
Num
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
CLKOUT to TS, BB assertion
(When driven by the memory
controller or PCMCIA interface)
CLKOUT to TS, BB negation
(when driven by the memory
controller or PCMCIA interface)
CLKOUT to TS, BB high-Z
driven by the memory controller
or PCMCIA interface)
CLKOUT to TEA assertion
CLKOUT to TEA high-Z
TA, BI valid to CLKOUT(setup
time)
CLKOUT (setup time
(setup time)
CLKOUT to TA, TEA, BI, BB, BG,
BR valid (Hold time).
TEA valid (hold time)
D[0–31], DP[0–3] valid to
CLKOUT rising edge (setup
time)
CLKOUT rising edge to D[0–31],
DP[0–3] valid (hold time)
D[0–31], DP[0–3] valid to
CLKOUT falling edge (setup
time)
CLKOUT falling edge to D[0–31],
DP[0–3] valid (hold time)
CLKOUT rising edge to CS
asserted GPCM ACS = 00
asserted GPCM ACS = 10, TRLX
= 0,1
asserted GPCM ACS = 11, TRLX
= 0, EBDF = 0
5
7
8
Characteristic
6
5
) 5
MPC850 (Rev. A/B/C) Hardware Specifications
Table 6. Bus Operation Timing
7
8
10.00
5.00
2.50
5.00
2.50
5.00
2.50
2.50
2.50
9.75
8.50
1.00
2.00
6.00
1.00
4.00
2.00
5.00
5.00
Min
—
50 MHz
11.00
11.75
11.00
19.00
15.00
10.00
15.00
11.75
11.75
Max
9.25
8.00
—
—
—
—
—
—
—
—
—
10.00
7.58
2.50
7.58
2.50
7.58
2.50
2.50
2.50
9.75
8.50
1.00
2.00
6.00
1.00
4.00
2.00
7.58
7.58
Min
—
66 MHz
13.58
14.33
11.00
21.58
15.00
10.00
15.00
14.33
14.33
Max
9.25
8.00
—
—
—
—
—
—
—
—
—
1
(continued)
10.00
6.25
2.50
6.25
2.50
6.25
2.50
2.50
2.50
9.75
8.50
1.00
2.00
6.00
1.00
4.00
2.00
6.25
6.25
Min
—
80 MHz
12.25
13.00
11.00
20.25
15.00
10.00
15.00
13.00
13.00
Max
9.25
8.00
—
—
—
—
—
—
—
—
—
FFACT
0.250
0.250
0.250
0.250
0.250
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
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
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
ns
ns
ns
ns
ns
ns
—
ns
ns
ns