ST7628
9.1.26 RAMRD : Memeory Read (2EH)
Command
A0
0
/RD /WR
D7
0
D6
0
D5
1
D4
0
D3
1
D2
1
D1
0
D0
0
Hex
(2Eh)
1
0
0
0
1
1
RAMRD
x
x
x
x
1
x
x
x
x
x
Dummy Read
Read Data 1 D1[7:0]
…
D7
D6
D5
D4
D3
D2
D1
D0
00H ~ FFH
1
Dn7
Dn6
Dn5
Dn4
Dn3
Dn2
Dn1
Dn0 00H ~ FFH
1
0
1
Read Data n Dn[7:0]
Description
This command is used to transfer data from frame memory to MCU. 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 MADCTR
setting. Then D[7:0] is read back from the frame memory and the column register and the page
register incremented. Frame Read can be stopped by sending any other command.
Memory Read is only possible via the Parallel Interface.
Restriction
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 or Booster Off
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 1.4
118/213
2008/08
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
