Cypress CY7C1347G manual Truth , 3, 4, 5

CY7C1347G

Table 5. Truth Table [2, 3, 4, 5, 6]

(continued)

Add.

Next Cycle

CE1

CE2

CE3

ZZ

ADSP

ADSC

ADV

WRITE

OE

CLK

DQ

Used

Write Cycle, Continue Burst

Next

X

X

X

L

H

H

L

L

X

L-H

D

Write Cycle, Continue Burst

Next

H

X

X

L

X

H

L

L

X

L-H

D

Read Cycle, Suspend Burst

Current

X

X

X

L

H

H

H

H

L

L-H

Q

Read Cycle, Suspend Burst

Current

X

X

X

L

H

H

H

H

H

L-H

Tri-State

Read Cycle, Suspend Burst

Current

H

X

X

L

X

H

H

H

L

L-H

Q

Read Cycle, Suspend Burst

Current

H

X

X

L

X

H

H

H

H

L-H

Tri-State

Write Cycle, Suspend Burst

Current

X

X

X

L

H

H

H

L

X

L-H

D

Write Cycle, Suspend Burst

Current

H

X

X

L

X

H

H

L

X

L-H

D

Table	6. Partial Truth Table for Read/Write[2, 7]
	Function	GW	BWE	BW	D	BW	C	BW	B	BW	A
Read		H	H	X		X		X		X
Read		H	L	H		H		H		H
Write Byte A – DQA		H	L	H		H		H		L
Write Byte B – DQB		H	L	H		H		L		H
Write Bytes B, A		H	L	H		H		L		L
Write Byte C– DQC		H	L	H		L		H		H
Write Bytes C, A		H	L	H		L		H		L
Write Bytes C, B		H	L	H		L		L		H
Write Bytes C, B, A		H	L	H		L		L		L
Write Byte D– DQD		H	L	L		H		H		H
Write Bytes D, A		H	L	L		H		H		L
Write Bytes D, B		H	L	L		H		L		H
Write Bytes D, B, A		H	L	L		H		L		L
Write Bytes D, C		H	L	L		L		H		H
Write Bytes D, C, A		H	L	L		L		H		L
Write Bytes D, C, B		H	L	L		L		L		H
Write All Bytes		H	L	L		L		L		L
Write All Bytes		L	X	X		X		X		X

Note

7. This table is only a partial listing of the byte write combinations. Any combination of BWx is valid. Appropriate write is based on which byte write is active.

Document #: 38-05516 Rev. *F Page 8 of 22

[+] Feedback