參數資料
型號： DTMFDECODER-RD
廠商： Silicon Laboratories Inc
文件頁數： 77/178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
168
Rev. 2.9
SFR Definition 16.2. PCA0MD: PCA Mode
Bit7:
CIDL: PCA Counter/Timer Idle Control.
Specifies PCA behavior when CPU is in Idle Mode.
0: PCA continues to function normally while the system controller is in Idle Mode.
1: PCA operation is suspended while the system controller is in Idle Mode.
Bit6:
WDTE: Watchdog Timer Enable
If this bit is set, PCA Module 2 is used as the Watchdog Timer.
0: Watchdog Timer disabled.
1: PCA Module 2 enabled as Watchdog Timer.
Bit5:
WDLCK: Watchdog Timer Lock
This bit locks/unlocks the Watchdog Timer Enable. When WDLCK is set, the Watchdog
Timer may not be disabled until the next system reset.
0: Watchdog Timer Enable unlocked.
1: Watchdog Timer Enable locked.
Bit4:
UNUSED. Read = 0b, Write = don't care.
Bits3–1: CPS2–CPS0: PCA Counter/Timer Pulse Select.
These bits select the clock source for the PCA counter
Bit0:
ECF: PCA Counter/Timer Overflow Interrupt Enable.
This bit sets the masking of the PCA Counter/Timer Overflow (CF) interrupt.
0: Disable the CF interrupt.
1: Enable a PCA Counter/Timer Overflow interrupt when CF (PCA0CN.7) is set.
Note: When the WDTE bit is set to ‘1’, the PCA0MD register cannot be modified. To change the
contents of the PCA0MD register, the Watchdog Timer must first be disabled.
R/W
Reset Value
CIDL
WDTE
WDLCK
—
CPS2
CPS1
CPS0
ECF
01000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xD9
CPS2
CPS1
CPS0
Timebase
0
System clock divided by 12
0
1
System clock divided by 4
0
1
0
Timer 0 overflow
0
1
High-to-low transitions on ECI (max rate = system clock
divided by 4)
1
0
System clock
1
0
1
External clock divided by 8*
1
0
Reserved
1
Reserved
*Note: External oscillator source divided by 8 is synchronized with the system clock.
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