MPC870 datasheet(21/84 Pages) FREESCALE

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MPC875/MPC870 Hardware Specifications, Rev. 3.0

PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE

Freescale Semiconductor

Bus Signal Timing

B31

CLKOUT falling edge to CS valid, as

requested by control bit CST4 in the

corresponding word in the UPM

(MAX = 0.00

× B1 + 6.00)

1.50

6.00

1.50

6.00

1.50

6.00

1.50

6.00

B31a

CLKOUT falling edge to CS valid, as

requested by control bit CST1 in the

corresponding word in the UPM

(MAX = 0.25

× B1 + 6.80)

7.60

14.30

6.30

13.00

3.80

10.50

3.13

10.00

B31b

CLKOUT rising edge to CS valid, as

requested by control bit CST2 in the

corresponding word in the UPM

(MAX = 0.00

× B1 + 8.00)

1.50

8.00

1.50

8.00

1.50

8.00

1.50

8.00

B31c

CLKOUT rising edge to CS valid, as

requested by control bit CST3 in the

corresponding word in the UPM

(MAX = 0.25

× B1 + 6.30)

7.60

13.80

6.30

12.50

3.80

10.00

3.13

9.40

B31d

CLKOUT falling edge to CS valid, as

requested by control bit CST1 in the

corresponding word in the UPM EBDF = 1

(MAX = 0.375

× B1 + 6.6)

13.30 18.00 11.30 16.00

7.60

12.30

4.69

11.30

B32

CLKOUT falling edge to BS valid, as

requested by control bit BST4 in the

corresponding word in the UPM

(MAX = 0.00

× B1 + 6.00)

1.50

6.00

1.50

6.00

1.50

6.00

1.50

6.00

B32a

CLKOUT falling edge to BS valid, as

requested by control bit BST1 in the

corresponding word in the UPM, EBDF = 0

(MAX = 0.25

× B1 + 6.80)

7.60

14.30

6.30

13.00

3.80

10.50

3.13

10.00

B32b

CLKOUT rising edge to BS valid, as

requested by control bit BST2 in the

corresponding word in the UPM

(MAX = 0.00

× B1 + 8.00)

1.50

8.00

1.50

8.00

1.50

8.00

1.50

8.00

B32c

CLKOUT rising edge to BS valid, as

requested by control bit BST3 in the

corresponding word in the UPM

(MAX = 0.25

× B1 + 6.80)

7.60

14.30

6.30

13.00

3.80

10.50

3.13

10.00

B32d

CLKOUT falling edge to BS valid, as

requested by control bit BST1 in the

corresponding word in the UPM, EBDF = 1

(MAX = 0.375

× B1 + 6.60)

13.30 18.00 11.30 16.00

7.60

12.30

4.49

11.30

B33

CLKOUT falling edge to GPL valid, as

requested by control bit GxT4 in the

corresponding word in the UPM

(MAX = 0.00

× B1 + 6.00)

1.50

6.00

1.50

6.00

1.50

6.00

1.50

6.00

Table 10. Bus Operation Timings (continued)

Num

Characteristic

33 MHz

40 MHz

66 MHz

80 MHz

Unit

Min

Max

Min

Max

Min

Max

Min

Max

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