MCM63Z818TQ100R データシートの表示（PDF） - Motorola => Freescale

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MCM63Z818TQ100R

128K x 36 and 256K x 18 Bit Pipelined ZBT™ RAM Synchronous Fast Static RAM

Motorola => Freescale 

TRUTH TABLE

SA0 –

CK

CKE

E

SW

SBx

ADV SAx

Next Operation

Input Command

Code

Notes

L–H

1

X

X

X

X

X Hold

H

1, 2

L–H

0

False

X

X

0

X Deselect

D

1, 2

L–H

0

True

0

V

0

V Load Address, New Write

W

1, 2, 3,

4, 5

L–H

0

True

1

X

0

V Load Address, New Read

R

1, 2

L–H

0

X

X

V (W)

1

X Burst

X (R, D)

Continue

B

1, 2, 4,

6, 7

NOTES:

1. X = don‘t care, 1 = logic high, 0 = logic low, V = valid signal, according to AC Operating Conditions and Characteristics.

2. E = true if SE1 and SE3 = 0, and SE2 = 1.

3. Byte write enables, SBx are evaluated only as new write addresses are loaded.

4. No control inputs except CKE, SBx, and ADV are recognized in a clock cycle where ADV is sampled high.

5. A write with SBx not valid does load addresses.

6. A burst write with SBx not valid does increment address.

7. ADV controls whether the RAM enters burst mode. If the previous cycle was a write, then ADV = 1 results in a burst write. If the previous

cycle is a read, then ADV = 1 results in a burst read. ADV = 1 will also continue a deslect cycle.

WRITE TRUTH TABLE

Cycle Type

Read

Write Byte a

Write Byte b

Write Byte c (See Note 1)

Write Byte d (See Note 1)

Write All Bytes

NOTE:

1. Valid only for MCM63Z736.

SBc

SBd

SW

SBa

SBb

(See Note 1) (See Note 1)

H

X

X

X

X

L

L

H

H

H

L

H

L

H

H

L

H

H

L

H

L

H

H

H

L

L

L

L

L

L

LINEAR BURST ADDRESS TABLE (LBO = VSS)

1st Address (External)

2nd Address (Internal)

X . . . X00

X . . . X01

X . . . X01

X . . . X10

X . . . X10

X . . . X11

X . . . X11

X . . . X00

3rd Address (Internal)

X . . . X10

X . . . X11

X . . . X00

X . . . X01

4th Address (Internal)

X . . . X11

X . . . X00

X . . . X01

X . . . X10

INTERLEAVED BURST ADDRESS TABLE (LBO = VDD)

1st Address (External)

2nd Address (Internal)

X . . . X00

X . . . X01

X . . . X01

X . . . X00

X . . . X10

X . . . X11

X . . . X11

X . . . X10

3rd Address (Internal)

X . . . X10

X . . . X11

X . . . X00

X . . . X01

4th Address (Internal)

X . . . X11

X . . . X10

X . . . X01

X . . . X00

MCM63Z736DMCM63Z818

6

MOTOROLA FAST SRAM

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