参数资料
型号: MC68HC05T16B
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 113/128页
文件大小: 734K
代理商: MC68HC05T16B
MC68HC05T16
MOTOROLA
9-15
ON-SCREEN DISPLAY
9
ON/OFF - OSD display on/off
1 (set)
OSD display on.
0 (clear) –
OSD display off.
For the fading feature, the whole screen is divided into several 16-horizontal-line segments. Notice
that a row might not t into the 16-horizontal-line segments. It might cross two segments,
depending on the vertical position of a row. The way that fade-in feature works is that one line in
all 16-line segments will appear in the rst fading sequence; two lines, including the one line in the
rst fading sequence, will appear in the second fading sequence; four lines, including the two lines
in the second fading sequence, will appear in the third fading sequence; eight lines, including the
four lines in the third fading sequence, will appear in the fourth fading sequence; and nally, all
sixteen lines, including the eight lines in the fourth fading sequence, will appear in the fth fading
sequence. Fade-out feature works in the opposite manner, that is, the number of display lines to
be disappeared are 8 lines, 12 lines, 14 lines, 15 lines, and all 16 lines in each disappearance
sequence, respectively. Fade out sequence for a character in a row tting right into the
16-horizontal-line segment is illustrated in Figure 9-7. Fading rate is xed at 32 frames per
sequence. Therefore, it takes 160 frames to execute the fade function. At 60 Hz vertical frequency,
this will take ve plus seconds. Note that when display disappears, all output pins are not
tri-stated, rather they remain in their deserted states.
CDRC3 to CDRC0 - Terminated display rows
These status bits reect the number of row displays that have been terminated. These bits are
reset only by vertical yback and incremented by one every time a row display has been
terminated.
9.5.2
Frame Control Register 2
BR1, BR0 - Blink rate select
These bits control the blinking rate of all symbols on the TV screen. The on/off ratio of blinking is
always 3/1.
VFPOL - VFLBK input polarity select
1 (set)
Vertical yback signal at VFLBK is active low.
0 (clear) –
Vertical yback signal at VFLBK is active high.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$1E
BR1
BR0
VFPOL
HFPOL
HTPOL
FBPOL RGBPOL
IPOL
0000 0000
TPG
83
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