PATENTED
READ Mode (Successive Address Reading)
HT1621/HT1621G
C S
W R
R D
1
1
0
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0
D a ta (M A + 1 ) D a ta (M A + 2 ) D a ta (M A + 3 )
M e m o ry A d d re s s (M A ) D a ta (M A )
D A T A
WRITE Mode (Command Code : 1 0 1)
C S
W R
1
0
1
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3
M e m o ry A d d re s s 1 (M A 1 ) D a ta (M A 1 )
1
0
1
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3
M e m o ry A d d re s s 2 (M A 2 ) D a ta (M A 2 )
D A T A
WRITE Mode (Successive Address Writing)
C S
W R
1
0
1
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3 D 0
D a ta (M A + 1 ) D a ta (M A + 2 ) D a ta (M A + 3 )
M e m o ry A d d re s s (M A ) D a ta (M A )
D A T A
Read-Modify-Write Mode (Command Code : 1 0 1)
C S
W R
R D
1
0
1
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3 D 0 D 1 D 2 D 3
M e m o ry A d d re s s 1 (M A 1 ) D a ta (M A 1 ) D a ta (M A 1 )
1
0
1
A 5 A 4 A 3 A 2 A 1 A 0 D 0 D 1 D 2 D 3
M e m o ry A d d re s s 2 (M A 2 ) D a ta (M A 2 )
D A T A
Rev. 3.10
11
November 5, 2012
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
