ST7669V
9.1.25 RAMRO : Memory Read (2EH)
A0
0
RD
1
WR
0
D7
0
D6
0
D5
1
D4
0
D3
1
D2
1
D1
1
D0
0
HEX
2EH
Command
1st parameter
2nd parameter
…
1
0
1
x
x
x
x
x
x
x
x
x
1
0
1
D17
Dx7
D16
Dx6
D15 D14
Dx5 Dx4
D13
Dx3
D12 D11
Dx2 Dx1
D10
Dx0
00H ~ FFH
00H ~ FFH
1
0
1
(N+1)th
1
0
1
Dn7
Dn6
Dn5 Dn4
Dn3
Dn2 Dn1
Dn0
00H ~ FFH
parameter
Description
This command is used to transfer data from frame memory to MCU.
This command makes no change to the other driver status.
When this command is accepted, the column register and the page register are reset to the Start
Column/Start Page positions.
The Start Column/Start Page positions are different in accordance with MADCTL setting. (See 7.3)
Then D[7:0] is read back from the frame memory and the column register and the page register
incremented as in Section 7.3
Frame Read can be stopped by sending any other command.
Restriction
In all color modes, the Frame Read is always 18bit so there is no restriction on length of parameters.
Note – Memory Read is only possible via the Parallel Interface.
Register
Availability
Status
Availability
Yes
Normal Mode On, Idle Mode Off, Sleep Out
Normal Mode On, Idle Mode On, Sleep Out
Partial Mode On, Idle Mode Off, Sleep Out
Partial Mode On, Idle Mode On, Sleep Out
Sleep In
Yes
Yes
Yes
Yes
Default
Status
Power On Sequence
S/W Reset
Default Value
Contents of memory is set randomly
Contents of memory is not cleared
Contents of memory is not cleared
H/W Reset
Ver 1.3
111/208
6/4/2008
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
