參數(shù)資料
型號(hào): MC68HC705T16B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封裝: PLASTIC, SDIP-56
文件頁(yè)數(shù): 111/128頁(yè)
文件大?。?/td> 734K
代理商: MC68HC705T16B
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MC68HC05T16
MOTOROLA
9-13
ON-SCREEN DISPLAY
9
RiEN - Row i display enable
1 (set)
Row i display enabled.
0 (clear) –
Row i display disabled.
If RiEN bit is set while the horizontal line currently being displayed has already passed the vertical
start position of this recently enabled row, this recently enabled row will not be displayed in this
frame. It will then be displayed in the next frame. That is, RiEN bit has to be set before current
horizontal display line reaches ((RiVP6-RiVP0)x4) for single scan mode or ((RiVP6-RiVP0)x4)x2
for double scan mode to enable display of row i in current frame.
Note that clearing RiEN bit does not clear the corresponding RiCF bit. Hence, care must be taken
before enabling RiINTE and RiEN to avoid interrupt caused by uncleared RiCF before the setting
of RiINTE and RiEN.
9.4.5
Row Control Register 2
RiCHS1, RiCHS0 - Row i character size
There are two predened numbers of total dots that can be displayed on a horizontal line. The
number of dots per line is a function of character size selection and the size of character dot
matrix. For the special case of 3Hx3V and 12x16 dot matrix, the number of total dots per line is
396; whereas for other combinations of character size and dot matrix, the number is 384 dots per
line. Users can avoid lling the unused bytes in a row since these bytes will not be displayed.
Table 9-2 lists the number of valid character bytes per row.
9.5
Frame
The following registers affect the frame of an OSD displays.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$2A
R3CHS1 R3CHS0 R2CHS1 R2CHS0 R1CHS1 R1CHS0 R0CHS1 R0CHS0
0000 0000
RiCHS1
RiCHS0
Character size of row i
0
basic - 1Hx1V
0
1
Single expanded - 2Hx2V
1
0
Double expanded - 3Hx3V
1
Triple expanded - 4Hx4V
TPG
81
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