TMP88CS38 datasheet(176/226 Pages) TOSHIBA

176 / 226 page

TMP88CS38/CM38A/CP38A

2007-09-12

88CS38-176

1. Normal mode

In normal mode, the display memory addresses are automatically incremented

each time data is read from or written to the memory. Because addresses are

automatically incremented, this mode may be used for reading from or writing

data to multiple continuous addresses simultaneously.

a. When writing either character code or character ornamentation data

(1) Set MFYWR, MBK, and RDWRV all to 0.

(2) Write the most significant address bit of the display memory to DMA8. Go on

and write the 8 low-order address bits of the display memory to DMA7 to

DMA0.

(3) Writing character code or character ornamentation data

•

Writing character code

Write the most significant bit of character code to CRA8. Go on and write

the 8 low-order bits of character code to CRA7 through CRA0. At this point in

time, the 9 bits of character code written are transferred to the display

memory, and DMA8 to DMA0 are automatically incremented.

•

Writing character ornamentation data

Write character ornamentation data to SLNT, EUL, BLF, IDT, RDT, GDT,

and BDT. At this point in time, the character ornamentation data written are

transferred to the display memory, and DMA8 to DMA0 are automatically

incremented.

(4) To write data (character code or character ornamentation data) to continuous

addresses, repeat step (3).

b. When writing character code and character ornamentation data at a time

(1) Set MFYWR to 0, MBK to 1, and RDWRV to 0.

(2) Write the most significant address bit of the display memory to DMA8. Go on

and write the 8 low-order address bits of the display memory to DMA7 to

DMA0.

(3) Write character ornamentation data to SLNT, EUL, BLF, IDT, RDT, GDT, and

BDT. At this point in time, the character ornamentation written are

transferred to the display memory.

(4) Write the most significant bit of character code to CRA8. Go on and write the 8

low-order bits of character code to CRA7 to CRA0. At this point in time, the 9

bits of character code written and the character ornamentation data written

in step (3) are transferred to the display memory, and DMA8 to DMA0 are

automatically incremented.

(5) To write data to continuous addresses, repeat steps (3) and (4).

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