M37212 Mitsubishi, M37212 Datasheet - Page 69

• Manufacturer Part Number: M37212
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
• Manufacturer: Mitsubishi

8.10.7 Multiline Display
This microcomputer can ordinarily display 2 lines on the CRT screen
by displaying 2 blocks at different vertical positions. In addition, it can
display up to 16 lines by using OSD interrupts.
An OSD 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.
Fig. 8.10.16 Note on Occurence of OSD Interrupt
Rev. 1.0
O n d i s p l a y ( O S D i n t e r r u p t r e q u e s t o c c u r s
a t t h e e n d o f b l o c k d i s p l a y )
B l o c k 1 ( o n d i s p l a y )
B l o c k 2 ( o n d i s p l a y )
B l o c k 1 ’ ( o n d i s p l a y )
B l o c k 2 ’ ( o n d i s p l a y )
M37212M4/M8–XXXSP, M37212M6–XXXSP/FP
“ O S D i n t e r r u p t r e q u e s t ”
“ O S D i n t e r r u p t r e q u e s t ”
“ O S D i n t e r r u p t r e q u e s t ”
“ O S D i n t e r r u p t r e q u e s t ”
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
O f f d i s p l a y ( O S D i n t e r r u p t r e q u e s t d o e s
n o t o c c u r a t t h e e n d o f b l o c k d i s p l a y )
Note: An OSD 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 by the display
control bit of the CRT control register (address 00EA
rupt request does not occur (refer to Figure 8.10.16).
B l o c k 1 ( o n d i s p l a y )
B l o c k 2 ( o n d i s p l a y )
B l o c k 1 ’ ( o f f d i s p l a y )
B l o c k 2 ’ ( o f f d i s p l a y )
with ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M37212EFSP/FP
“ O S D i n t e r r u p t r e q u e s t ”
“ O S D i n t e r r u p t r e q u e s t ”
N o
“ O S D i n t e r r u p t r e q u e s t ”
N o
“ O S D i n t e r r u p t r e q u e s t ”
16
), an OSD inter-
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