10

Data Sheet M14904EJ3V0DS

µPD4482163, 4482183, 4482323, 4482363

Partial Truth Table for Write Enables

[

µµµµPD4482163, µµµµPD4482183]

Operation

/GW

/BWE

/BW1

/BW2

Read Cycle

H

H

××

Read Cycle

H

L

H

H

Write Cycle / Byte 1 (I/O [1:8], I/OP1)

H

L

L

H

Write Cycle / Byte 2 (I/O [9:16], I/OP2)

H

L

H

L

Write Cycle / All Bytes

H

L

L

L

Write Cycle / All Bytes

L

××

×

Remark

× : don’t care

[

µµµµPD4482323, µµµµPD4482363]

Operation

/GW

/BWE

/BW1

/BW2

/BW3

/BW4

Read Cycle

H

H

××

×

×

Read Cycle

H

L

H

H

H

H

Write Cycle / Byte 1 (I/O [1:8], I/OP1)

H

L

L

H

H

H

Write Cycle / Byte 2 (I/O [9:16], I/OP2)

H

L

H

L

H

H

Write Cycle / Byte 3 (I/O [17:24], I/OP3)

H

L

H

H

L

H

Write Cycle / Byte 4 (I/O [25:32], I/OP4)

H

L

H

H

H

L

Write Cycle / All Bytes

H

L

L

L

L

L

Write Cycle / All Bytes

L

××

××

×

Remark

× : don’t care

Pass-Through Truth Table

Previous Cycle

Present Cycle

Next Cycle

Operation

Add

/WRITE

I/O

Operation

Add

/CEs /WRITE

/G

I/O

Operation

Write Cycle

Ak

L

Dn(Ak)

Read Cycle

Am

L

H

L

Q1(Ak)

Read Q1(Am)

(Begin Burst)

Deselected

-

H

××

High-Z

No Carry Over from

Previous Cycle

Remarks 1.

× : don’t care

2. /WRITE = L means any one or more byte write enables (/BW1, /BW2, /BW3 or /BW4) and /BWE are

LOW or /GW is LOW.

/WRITE = H means the following two cases.

(1) /BWE and /GW are HIGH.

(2) /BW1, /BW2 and /GW are HIGH, and /BWE is LOW. [

µPD4482163, µPD4482183]

/BW1 to /BW4 and /GW are HIGH, and /BWE is LOW. [

µPD4482323, µPD4482363]

/CEs = L means /CE is LOW, /CE2 is LOW and CE2 is HIGH.

/CEs = H means /CE is HIGH or /CE2 is HIGH or CE2 is LOW.

ZZ (Sleep) Truth Table

ZZ

Chip Status

Active

Open

Active

Sleep