HT1621B View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT1621B' PDF : 20 Pages View PDF
Read-Modify-Write Mode (Successive Address Accessing)
CS
WR
HT1621
RD
D ATA
1 0 1 A5 A4 A3 A2 A1 A0 D0 D1 D2 D3 D0 D1 D2 D3 D0 D1 D2 D3 D0 D1 D2 D3 D0 D1 D2 D3 D0
M e m o ry A d d re s s (M A ) D a ta (M A ) D a ta (M A ) D a ta (M A + 1 ) D a ta (M A + 1 ) D a ta (M A + 2 )
Command Mode (Command Code : 1 0 0)
CS
WR
D ATA
1 0 0 C8 C7 C6 C5 C4 C3 C2 C1 C0
C8 C7 C6 C5 C4 C3 C2 C1 C0
C om m and 1
C o m m a n d ...
C om m and i
C om m and
or
D a ta M o d e
Mode (Data And Command Mode)
CS
WR
D ATA
C om m and
or
A d d re s s & D a ta
D a ta M o d e
C om m and
or
A d d re s s a n d D a ta
D a ta M o d e
C om m and
or
A d d re s s a n d D a ta
D a ta M o d e
RD
Note: It is recommended that the host controller should read in the data from the DATA line between the rising edge
of the RD line and the falling edge of the next RD line.
Rev. 1.30
11
August 6, 2003
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