參數(shù)資料
型號: ADUC7034BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 113/136頁
文件大?。?/td> 0K
描述: IC MCU FLASH 32K ANLG IO 48LFCSP
標(biāo)準(zhǔn)包裝: 1
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 20.48MHz
連通性: LIN,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 9
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: 閃存
RAM 容量: 1K x 32
電壓 - 電源 (Vcc/Vdd): 3.5 V ~ 18 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 2x16b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 115°C
封裝/外殼: 48-VFQFN 裸露焊盤,CSP
包裝: 托盤
ADuC7034
Rev. B | Page 78 of 136
TIMER2—WAKE-UP TIMER
Timer2 is a 32-bit wake-up up/down counter timer with a
programmable prescaler. The prescaler is clocked directly from
one of four clock sources, namely, the core clock (which is the
default selection), the low power 32.768 kHz oscillator, the
external 32.768 kHz watch crystal, or the precision 32.768 kHz
oscillator. The selected clock source can be scaled by a factor of
1, 16, 256, or 32,768. The wake-up timer continues to run when
the core clock is disabled. When the core is operating at 20.48 MHz
and at CD = 0 with a prescaler of 1, a minimum resolution of
48.83 ns results.
The counter can be formatted as a plain 32-bit value or as time
expressed as hours:minutes:seconds:hundredths.
Timer2 reloads the value from T2LD when Timer2 overflows.
The Timer2 interface consists of four MMRS.
T2LD and T2VAL are 32-bit registers and hold 32-bit
unsigned integers. T2VAL is a read only register.
T2CLRI is an 8-bit register. Writing any value to this
register clears the Timer2 interrupt.
T2CON is a configuration MMR and is described in Table 54.
Timer2 Load Register
Name:
T2LD
Address:
0xFFFF0340
Default Value:
0x00000000
Access:
Read/write
Function:
T2LD is a 32-bit register that holds the 32-bit
value that is loaded into the counter.
Timer2 Clear Register
Name:
T2CLRI
Address:
0xFFFF034C
Access:
Write only
Function:
This 8-bit, write only MMR is written (with
any value) by user code to clear the interrupt.
Timer2 Value Register
Name:
T2VAL
Address:
0xFFFF0344
Default Value:
0xFFFFFFFF
Access:
Read only
Function:
T2VAL is a 32-bit register that holds the
current value of Timer2.
TIMER2 IRQ
32-BIT
UP/DOWN COUNTER
PRECISION
32.768kHz OSCILLATOR
LOW POWER
32.768kHz OSCILLATOR
CORE
CLOCK
32-BIT LOAD
PRESCALER
1, 16, 256, OR 32,768
EXTERNAL 32.768kHz
WATCH CRYSTAL
TIMER2
VALUE
071
16
-03
2
Figure 36. Timer2 Block Diagram
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