參數(shù)資料
型號(hào): M37224M3-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42
文件頁(yè)數(shù): 41/83頁(yè)
文件大?。?/td> 901K
代理商: M37224M3-XXXSP
M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
46
(7) Multiline Display
The M37224M3-XXXSP can ordinarily display 2 lines on the CRT
screen by displaying 2 blocks at different vertical positions. In addi-
tion, it can display up to 16 lines by using CRT interrupts.
A CRT interrupt request occurs at the point at which display of each
block has been completed. In other words, when a scanning line
reaches the point of the display position (specified by the vertical
position registers) of a certain block, the character display of that
block starts, and an interrupt occurs at the point at which the scan-
ning line exceeds the block.
Note:
A CRT interrupt does not occur at the end of display when
the block is not displayed. In other words, if a block is set to
off display with the display control bit of the CRT control reg-
ister (address 00EA16), a CRT interrupt request does not
occur (refer to Figure 47).
Fig. 47. Timing of CRT Interrupt Request
Block 1 (on display)
“CRT interrupt request”
On display (CRT interrupt request occurs at the end of block
display)
Block 2 (on display)
Block 1' (on display)
Block 2' (on display)
“CRT interrupt request”
Block 1 (on display)
“CRT interrupt request”
Off display (CRT interrupt request does not occur at the end of
block display)
Block 2 (on display)
Block 1' (off display)
Block 2' (off display)
“CRT interrupt request”
No “CRT interrupt request”
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