MPC852T datasheet(19/80 Pages) FREESCALE

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MPC852T PowerQUICC™ Hardware Specifications, Rev. 4

Freescale Semiconductor

Bus Signal Timing

B30b

WE(0:3)/BS_B[0:3] negated to A(0:31)

Invalid GPCM BADDR(28:30) invalid

GPCM write access, TRLX = 1, CSNT = 1.

CS negated to A(0:31) Invalid GPCM write

access TRLX = 1, CSNT = 1, ACS = 10, or

ACS == 11 EBDF = 0

(MIN = 1.50

× B1 – 2.00)

43.50

—

35.50

—

28.00

—

20.70

—

B30c

WE(0:3)/BS_B[0:3] negated to A(0:31),

BADDR(28:30) invalid GPCM write

access, TRLX = 0, CSNT = 1. CS negated

to A(0:31) invalid GPCM write access,

TRLX = 0, CSNT = 1 ACS = 10,

ACS == 11, EBDF = 1

(MIN = 0.375

× B1 – 3.00)

8.40

—

6.40

—

4.50

—

2.70

—

B30d

WE(0:3)/BS_B[0:3] negated to A(0:31),

BADDR(28:30) invalid GPCM write access

TRLX = 1, CSNT =1, CS negated to

A(0:31) invalid GPCM write access

TRLX = 1, CSNT = 1, ACS = 10 or 11,

EBDF = 1

38.67

—

31.38

—

24.50

—

17.83

—

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

5.00

11.80

3.80

10.50

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

5.00

11.30

3.80

10.00

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

9.40

14.10

7.60

12.30

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

Table 9. Bus Operation Timings (continued)

Num

Characteristic

33 MHz

40 MHz

50 MHz

66 MHz

Unit

Min

Max

Min

Max

Min

Max

Min

Max

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