R1Q5A3636B/R1Q5A3618B

REJ03C0344-0003 Rev.0.03 Apr.11, 2008

page 8 of 23

K Truth Table

Operation

K

/R

/W

D or Q

Data in

Input

data

D(A1)

D(A2)

D(A3)

D(A4)

Write Cycle:

Load address, input write data

on consecutive K and /K rising

edges

↑

L

L

Output

clock

K(t+1)

↑

/K(t+1)

↑

K(t+2)

↑

/K(t+2)

↑

Data out

Output

data

Q(A1)

Q(A2)

Q(A3)

Q(A4)

Read Cycle:

Load address, output read

data on consecutive C and /C

rising edges

↑

L

H

Output

clock

/C(t+1)

↑

C(t+2)

↑

/C(t+2)

↑

C(t+3)

↑

NOP (No operation)

↑

H

×

High-Z

Standby (Clock stopped)

Stopped

×

×

Previous state

Notes: 1. H: high level, L: low level, ×: don’t care, ↑: rising edge.

2. Data inputs are registered at K and /K rising edges. Data outputs are delivered at C and /C rising edges,

except if C and /C are high, then data outputs are delivered at K and /K rising edges.

3. /LD and R-/W must meet setup/hold times around the rising edges (low to high) of K and are registered at the

rising edge of K.

4. This device contains circuitry that will ensure the outputs will be in high-Z during power-up.

5. Refer to state diagram and timing diagrams for clarification.

6. When clocks are stopped, the following cases are recommended; the case of K = low, /K = high, C = low and

/C = high, or the case of K = high, /K = low, C = high and /C = low. This condition is not essential, but permits

most rapid restart by overcoming transmission line charging symmetrically.

7. A1 refers to the address input during a WRITE or READ cycle. A2, A3 and A4 refer to the 1st, 2nd and 3rd

internal burst address, respectively, in accordance with the linear burst sequence.

Byte Write Truth Table (x36)

Operation

K

/K

/BW0

/BW1

/BW2

/BW3

Write D0 to D35

↑



L

L

L

L



↑

L

L

L

L

Write D0 to D8

↑



L

H

H

H



↑

L

H

H

H

Write D9 to D17

↑



H

L

H

H



↑

H

L

H

H

Write D18 to D26

↑



H

H

L

H



↑

H

H

L

H

Write D27 to D35

↑



H

H

H

L



↑

H

H

H

L

Write nothing

↑



H

H

H

H



↑

H

H

H

H

Notes: 1. H: high level, L: low level,

↑: rising edge.

2. Assumes a WRITE cycle was initiated. /BWx can be altered for any portion of the BURST WRITE operation

provided that the setup and hold requirements are satisfied.