S1D13305D00A EPSON [Epson Company], S1D13305D00A Datasheet - Page 66

• Manufacturer Part Number: S1D13305D00A
• Description: LCD Controller ICs
• Manufacturer: EPSON [Epson Company]

MICROPROCESSOR INTERFACE
Note
A possible problem with the display memory read cycle is that the system bus access time,
depend on the display memory access time,
read loop time exceeds the S1D13305 series cycle time,
in the program loop.
60
Microprocessor
Display memory
Microprocessor
Display memory
VRW
VRW
t
VD0 to VD7
VD0 to VD7
ACC
D0 to D7
D0 to D7
VR/W
VR/W
,
WR
WR
RD
t
ACV
and
Figure 47. Display memory write cycle
Figure 48. Display memory read cycle
Command write
t
CYC
Command write
limits are given in section 6.2.
t
ACV
. The microprocessor may only make repeated reads if the
EPSON
Data write
t
CYC
. If it does not, NOP instructions may be inserted
t
CYC
Data read
Data write
t
CYC
Data read
t
ACC
S1D13305 Series
Technical Manual
, does not