参数资料
型号: ST72774S9T1/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
封装: TQFP-44
文件页数: 107/144页
文件大小: 1280K
代理商: ST72774S9T1/XXX
ST72774/ST727754/ST72734
65/144
SYNC PROCESSOR (SYNC) (Cont’d)
4.4.8 Analyzer Mode
The
analyzer
block
is
used
for
all
extra
measurements on the sync signals to manage the
monitor functions:
– Measure the number of scan lines per frame
(VSYNCO or VFBACK) to simplify the OSD ver-
tical centering.
– Measure the low level of HSYNCO or HFBACK.
This function can be used for VSYNCO pulse
extension or for a fast estimation of the incoming
Hsync signal period.
– Detection of the pre/post equalization pulses.
Notes:
1. Analyzer mode should be performed before
corrector mode.
2. When analyzer mode is active, the free-running
frequencies generator and corrector mode must
be disabled.
– HVGEN = 0 in ENR register
– 2FHINH 0 in CFGR register for Horizontal low
level measurement
– VEXT = 0, VCORDIS = 1 in CFGR, POLR reg-
isters for Vertical output measurement
3. If H/VBACK are selected (FBSEL=0) corrector
mode must be disabled
4. For all measurements, HSYNCO and VSYNCO
must be POSITIVE.
4.4.8.1 Horizontal Low Level Measurement
The measurement starts in setting HACQ by
software. When this bit is cleared by hardware, the
HGENR register returns the result.
The algorithm is shown in Figure 45.
HLow = ((255-HGENR+1)/4) s
Note: HLow maximum value = 64s (even if real value is
greater)
For maximum accuracy, it is possible to measure
the low level of HFBACK with the same technique
(FBSEL bit in the MCR register).
Figure 45. Horizontal Low Level Measurement
VR02118A
END
HGENR=Result
HACQ=0?
Measure HLow
Disable H correction Mode
2FHINH=0
Disable H internal generation
HVGEN=0
HSYNCO Positive polarity
Necessary if Signals
are H/VSYNCO
Select H/VBACK or H/VSYNCO
FBSEL=0 or 1
HACQ=1
Start measurement
No
Yes
相关PDF资料
PDF描述
ST72E734J6D0 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42
ST72T774S9T1 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44
ST7294C6B6 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28
ST72T94C6M6 8-BIT, OTPROM, MICROCONTROLLER, PDSO28
ST72C171K2B6 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
相关代理商/技术参数
参数描述
ST727X4-EMU2B 制造商:STMicroelectronics 功能描述:REALTIME EMULATOR BOARD - Bulk
ST727X4-EPB/US 制造商:STMicroelectronics 功能描述:PROGRAMMER - Bulk
ST-7-28 功能描述:XFRMR PWR 115V 14VAC 2.6A RoHS:是 类别:变压器 >> 功率 系列:ST 标准包装:1 系列:260 类型:标准 最大功率:65 VA 主线圈:双 副线圈:三路,中心抽头 在某电流时的串联输出电压:500 VAC @ 85mA,5 VAC @ 2A,6.3 VAC @ 2A 在某电流时的并联输出电压:- 安装类型:底座安装 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高(最大):66.80mm 端接类型:导线引线
ST7-28 制造商:SUPERWORLD 制造商全称:Superworld Electronics 功能描述:POWER TRANSFORMER
ST7-28B56 功能描述:电源变压器 SPLIT BOBBIN HORZ MOUNT XFMR RoHS:否 制造商:Triad Magnetics 功率额定值:12 VA 初级电压额定值:115 V / 230 V 次级电压额定值:12 V / 24 V 安装风格:SMD/SMT 一次绕组:Dual Primary Winding 二次绕组:Dual Secondary Winding 长度:2.5 in 宽度:2 in 高度:1.062 in