參數(shù)資料
型號： DTMFDECODER-RD
廠商： Silicon Laboratories Inc
文件頁數(shù)： 120/178頁
文件大?。?/td> 0K
描述： KIT REF DESIGN DTMF DECODER
應用說明： DTMF Decoder Ref Design AppNote
標準包裝： 1
主要目的： 電信，DTMF 解碼器
嵌入式： 否
已用 IC / 零件： C8051F300
主要屬性： 8kHz 采樣速率模數(shù)轉換器
次要屬性： 16 個 Goertzel 濾波器
已供物品： 板，軟件
產品目錄頁面： 627 (CN2011-ZH PDF)
相關產品： 336-1535-5-ND - IC 8051 MCU 8K FLASH 14-SOIC
C8051F300-GMR-ND - IC 8051 MCU 8K FLASH 11QFN
336-1245-ND - IC 8051 MCU 8K FLASH 11QFN
其它名稱： 336-1283
C8051F300/1/2/3/4/5
46
Rev. 2.9
5.4.2. Window Detector In Differential Mode
Figure 5.7 shows two example window comparisons for differential mode, with ADC0LT = 0x10 (+16d) and
ADC0GT = 0xFF (–1d). Notice that in Differential mode, the codes vary from –VREF to VREF x (127/128)
and are represented as 8-bit 2’s complement signed integers. In the left example, an AD0WINT interrupt
will be generated if the ADC0 conversion word (ADC0L) is within the range defined by ADC0GT and
ADC0LT (if 0xFF (–1d) < ADC0 < 0x10 (16d)). In the right example, an AD0WINT interrupt will be gener-
ated if ADC0 is outside of the range defined by ADC0GT and ADC0LT (if ADC0 < 0xFF (–1d) or ADC0 >
0x10 (+16d)).
0x7F (127d)
0x11 (17d)
0x10 (16d)
0x0F (15d)
0x00 (0d)
0xFF (-1d)
0xFE (-2d)
0x80 (-128d)
-REF
Input Voltage
(P0.x - P0.y)
REF x (127/128)
REF x (16/128)
REF x (-1/256)
0x7F (127d)
0x11 (17d)
0x10 (16d)
0x0F (15d)
0x00 (0d)
0xFF (-1d)
0xFE (-2d)
0x80 (-128d)
-REF
Input Voltage
(P0.x - P0.y)
REF x (127/128)
REF x (16/128)
REF x (-1/256)
AD0WINT=1
AD0WINT
not affected
AD0WINT
not affected
ADC0LT
ADC0GT
AD0WINT
not affected
ADC0GT
ADC0LT
AD0WINT=1
ADC0
Figure 5.7. ADC Window Compare Examples, Differential Mode
SFR Definition 5.5. ADC0GT: ADC0 Greater-Than Data Byte (C8051F300/2)
Bits7–0: ADC0 Greater-Than Data Word.
R/W
Reset Value
11111111
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xC4
SFR Definition 5.6. ADC0LT: ADC0 Less-Than Data Byte (C8051F300/2)
Bits7–0: ADC0 Less-Than Data Word.
R/W
Reset Value
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xC6
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