k7r161882b Samsung Semiconductor, Inc., k7r161882b Datasheet - Page 10

• Manufacturer Part Number: k7r161882b
• Description: 512kx36-bit, 1mx18-bit, 2mx9-bit Qdrtm Ii B2 Sram
• Manufacturer: Samsung Semiconductor, Inc.

K7R163682B
K7R160982B
K7R161882B
TRUTH TABLES
SYNCHRONOUS TRUTH TABLE
Notes: 1. X means “Don′t Care”.
WRITE TRUTH TABLE
Notes: 1. X means "Don′t Care”.
WRITE TRUTH TABLE
Notes: 1. X means “Don′t Care”.
Stopped
K
↑
↑
↑
K
↑
↑
↑
↑
↑
2. The rising edge of clock is symbolized by ( ↑ ).
3. Before enter into clock stop status, all pending read and write operations will be completed.
2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K ( ↑ ).
3. Assumes a WRITE cycle was initiated.
2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K ( ↑ ).
3. Assumes a WRITE cycle was initiated.
4. This table illustrates operation for x18 devices. x9 device operation is similar except that
K
↑
↑
↑
↑
R
X
H
X
L
K
↑
↑
↑
↑
↑
K
↑
↑
↑
↑
W
X
H
X
L
(x18)
(x36)
BW
H
H
H
H
H
H
L
L
L
L
0
Previous state
Din at K(t)
BW
D(A0)
H
H
H
H
L
L
L
L
X
X
0
BW
H
H
H
H
H
H
L
L
L
L
1
512Kx36 & 1Mx18 & 2Mx9 QDR
D
BW
BW
Previous state
H
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
Din at K(t)
1
2
D(A1)
X
X
- 10 -
BW
H
H
H
H
H
H
L
L
L
L
3
D
Previous state
OUT
High-Z
Q(A0)
at C(t+1)
X
BW
WRITE ALL BYTEs ( K↑ )
WRITE ALL BYTEs ( K↑ )
WRITE NOTHING ( K↑ )
WRITE NOTHING ( K↑ )
WRITE BYTE 2 and BYTE 3 ( K↑ )
WRITE BYTE 2 and BYTE 3 ( K↑ )
WRITE BYTE 0 ( K↑ )
WRITE BYTE 0 ( K↑ )
WRITE BYTE 1 ( K↑ )
WRITE BYTE 1 ( K↑ )
controls D0:D8.
WRITE ALL BYTEs ( K↑ )
WRITE ALL BYTEs ( K↑ )
OPERATION
WRITE NOTHING ( K↑ )
WRITE NOTHING ( K↑ )
WRITE BYTE 0 ( K↑ )
WRITE BYTE 0 ( K↑ )
WRITE BYTE 1 ( K↑ )
WRITE BYTE 1 ( K↑ )
Q
D
Previous state
OPERATION
OUT
High-Z
Q(A1)
Rev. 5.0 July 2006
at C(t+2)
X
TM
II b2 SRAM
No Operation
OPERATION
Clock Stop
Read
Write