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參數(shù)資料
型號： MC68HC05BD5
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 69/112頁
文件大小： 676K
代理商： MC68HC05BD5
MC68HC05BD3
MOTOROLA
8-9
SYNC SIGNAL PROCESSOR
8
8.3.2
Vertical Frequency Registers (VFRS)
This 13-bit read only register pair contains information of the vertical frame frequency. An internal
counter counts the number of internal clocks between two VSYNC pulses. The counted value will
then be transferred to this register. The data corresponds to the period of one vertical frame. This
register can be read to determine if the frame frequency is valid, and to determine the video mode.
However, the data is not valid if VDET bit is cleared.
The frame frequency is calculated by 1/(VFR
±
1 x 8
μ
s) or 1/(VFR
±
1 x 16t
CYC
).
The table below shows examples for the Vertical Frequency Register, all VFR numbers are in
hexadecimal
.
8.3.3
Line Frequency Registers (LFRs)
This 12-bit read only register pair contains the number of horizontal lines in each vertical frame.
An internal line counter counts the horizontal sync pulses between two vertical sync pulses. The
counted value will be transferred to this register pair. HOVER bit will be set if the incoming
horizontal sync pulses between two vertical sync pulses are more than 4096 or there is no vertical
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
VFHR
$000D
VF12
VF11
VF10
VF9
VF8
0000 0000
VFLR
$000E
VF7
VF6
VF5
VF4
VF3
VF2
VF1
VF0
0000 0000
Table 8-1
Vertical Frame Frequencies
VFR
$03C0
$03C1
$03C2
$04E2
$04E3
$04E4
$06F9
$06FA
$06FB
Min. Freq.
130.07
129.94
129.80
99.92
99.84
99.76
69.99
69.95
69.91
Max. Freq.
130.34
130.21
130.07
100.08
100.00
99.92
70.07
70.03
69.99
VFR
$0823
$0824
$0825
$09C4
$09C5
$09C6
$1FFD
$1FFE
$1FFF
Min. Freq.
59.98
59.95
59.92
49.98
49.96
49.94
15.262
15.260
15.258
Max. Freq.
60.04
60.01
59.98
50.02
50.00
49.98
15.266
15.264
15.262
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
LFHR
$000F HOVER
LF11
LF10
LF9
LF8
0000 0000
LFLR
$0010
LF7
LF6
LF5
LF4
LF3
LF2
LF1
LF0
0000 0000
TPG
相關(guān)PDF資料
PDF描述
MC68HC705BD3 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HC05C4 8-Bit Microcontroller Units (MCU).(8位微控制器)
MC68HC05C5 8-Bit Microcontroller Units (MCU).(8位微控制器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05C0CP 制造商:Motorola Inc 功能描述:
MC68HC05C12 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS
MC68HC05C12B 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS
MC68HC05C12CP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS
MC68HC05C12P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNITS
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