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HT1621 Datasheet(PDF) 12 Page - Holtek Semiconductor Inc

Part No. HT1621
Description  RAM Mapping 324 LCD Controller for I/O MCU
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Maker  HOLTEK [Holtek Semiconductor Inc]
Homepage  http://www.holtek.com
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HT1621 Datasheet(HTML) 12 Page - Holtek Semiconductor Inc

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Read-Modify-Write Mode (Successive Address Accessing)
Command Mode (Command Code:100)
Mode (Data and Command Mode)
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.
HT1621/HT1621G
Rev. 2.90
12
November 9, 2010
PATENTED
D A T A
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 r y A d d r e s s ( M A ) D a t a ( M A )
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 t a ( M A )
D a t a ( M A + 1 ) D a t a ( M A + 1 )
R D
D 1 D 2 D 3 D 0
D a t a ( M A + 2 )
D A T A
C S
W R
1
0
0 C 8 C 7 C 6 C 5 C 4 C 3 C 2 C 1 C 0
C o m m a n d 1
C 8 C 7 C 6 C 5 C 4 C 3 C 2 C 1 C 0
C o m m a n d i
C o m m a n d . . .
C o m m a n d
o r
D a t a M o d e
R D
D A T A
C S
W R
A d d r e s s & D a t a
C o m m a n d
o r
D a t a M o d e
A d d r e s s a n d D a t a
C o m m a n d
o r
D a t a M o d e
A d d r e s s a n d D a t a
C o m m a n d
o r
D a t a M o d e


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