tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 177

• Manufacturer Part Number: tmp88cs38ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

<Display memory read sequence in normal mode>
a.
b.
2.
a.
(1) Set MFYWR to 0, MBK to 0, and RDWRV to 1.
(2) Write the most significant address bit of the display memory to DMA8. Go on
(3) Reading character code or character ornamentation data
(4) To read data (Character code or character ornamentation data) from
(1) Set MFYWR to 0, MBK to 1, and RDWRV to 1.
(2) Write the most significant address bit of the display memory to DMA8. Go on
(3) Read character ornamentation data SLNT, EUL, BLF, IDT, RDT, GDT, and
(4) Read the most significant bit of character code to CRA8. Read the 8 low-order
(5) To read data from continuous addresses, repeat steps (3) and (4).
(1) Set MFYWR to 1 and MBK to 0, and RDWRV to 1.
(2) Write the most significant address bit of the display memory to DMA8. Go on
(3) Reading character code or character ornamentation data
When reading either character code or character ornamentation data
•
•
When reading character code and character ornamentation data at a time
Read-modify-write mode
are automatically incremented as in normal mode, but when reading data in this
mode, the memory addresses are not automatically incremented.
address, you can execute a write to the same display memory address. After
executing a write, the display memory addresses are automatically incremented.
Reading/writing either character code or character ornamentation data in
read-modify-write mode
•
When writing data in read-modify-write mode, the display memory addresses
Therefore, immediately after executing a read from some display memory
and write the 8 low-order address bits of the display memory to DMA7 to
DMA0.
8 low-order bits of character code to CRA7 to CRA0. At this point in time,
DMA8 to DMA0 are automatically incremented.
BDT. At this point in time, DMA8 through DMA0 are automatically
incremented.
continuous addresses, repeat step (3).
and write the 8 low-order address bits of the display memory to DMA7 to
DMA0.
BDT.
bits of character code to CRA7 to CRA0. At this point in time, DMA8 to DMA0
are automatically incremented.
and write the 8 low-order address bits of the display memory to DMA7 to
DMA0.
low-order bits of character code to CRA7 to CRA0. DMA8 to DMA0 are not
incremented.
Reading character code
Reading character ornamentation data
Reading character code
Read the most significant bit of character code to CRA8. Go on and read the
Read character ornamentation data SLNT, EUL, BLF, IDT, RDT, GDT, and
Read the most significant bit of character code to CRA8. Read the 8
88CS38-177
TMP88CS38/CM38A/CP38A
2007-09-12