參數(shù)資料
型號(hào)： EVAL-ADUC7128QSPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 75/92頁(yè)
文件大小： 0K
描述： KIT DEV FOR ADUC7128
產(chǎn)品培訓(xùn)模塊： ARM7 Applications & Tools
Intro to ARM7 Core & Microconverters
設(shè)計(jì)資源： ADUC7128 Dev System Schematic
ADUC7128 Gerber Files
標(biāo)準(zhǔn)包裝： 1
系列： QuickStart™ PLUS 套件
類型： MCU
適用于相關(guān)產(chǎn)品： ADuC7128
所含物品： 評(píng)估板、電源、纜線、軟件、仿真器和說(shuō)明文檔
產(chǎn)品目錄頁(yè)面： 739 (CN2011-ZH PDF)
相關(guān)產(chǎn)品： ADUC7128BSTZ126-RLDKR-ND - IC DAS MCU ARM7 ADC/DDS 64-LQFP
ADUC7128BCPZ126-RLDKR-ND - IC DAS MCU ARM7 ADC/DDS 64-LFCSP
ADUC7128BSTZ126-RLCT-ND - IC DAS MCU ARM7 ADC/DDS 64-LQFP
ADUC7128BCPZ126-RLCT-ND - IC DAS MCU ARM7 ADC/DDS 64-LFCSP
ADUC7128BSTZ126-RLTR-ND - IC DAS MCU ARM7 ADC/DDS 64-LQFP
ADUC7128BCPZ126-RLTR-ND - IC DAS MCU ARM7 ADC/DDS 64-LFCSP
ADUC7128BSTZ126-ND - IC DAS MCU ARM7 ADC/DDS 64-LQFP
ADUC7128BCPZ126-ND - IC DAS MCU ARM7 ADC/DDS 64-LFCSP
ADuC7128/ADuC7129
Rev. 0 | Page 77 of 92
TIMER2—WAKE-UP TIMER
TIMER2IRQ
32-BIT
LOAD
32-BIT
UP/DOWN
COUNTER
TIMER2
VALUE
PRESCALER
1, 16, 256,
OR 32768
EXTERNAL 32kHz
OSCILLATOR
INTERNAL 32kHz
OSCILLATOR
CORE CLOCK
0
6020-
052
Figure 57. Timer2 Block Diagram
Timer2 is a 32-bit wake-up timer, count down or count up, with
a programmable prescaler. The prescaler is clocked directly from
one of four clock sources, namely, the core clock (default selection),
the internal 32.768 kHz oscillator, the external 32.768 kHz watch
crystal, or the core clock. The selected clock source can be
scaled by a factor of 1, 16, 256, or 32768. The wake-up timer
continues to run when the core clock is disabled. This gives
a minimum resolution of 22 ns when the core is operating at
41.78 MHz and with a prescaler of 1. Capture of the current
timer value is enabled if the Timer2 interrupt is enabled via
IRQEN[4].
The counter can be formatted as plain 32-bit value or as
hours:minutes:seconds:hundredths.
Timer2 reloads the value from T2LD either when Timer2
overflows or immediately after T2ICLR is written.
The Timer2 interface consists of four MMRs, as shown in
Table 112. Timer2 Interface MMRs
Name
Description
T2LD
A 32-bit register. Holds 32-bit unsigned integers.
T2VAL
A 32-bit register. Holds 32-bit unsigned integers.
This register is read only.
T2ICLR
An 8-bit register. Writing any value to this register
clears the Timer2 interrupt.
T2CON
The configuration MMR (see Table 113).
Timer2 Load Register
Name
Address
Default Value
Access
T2LD
0xFFFF0340
0x00000
R/W
T2LD is a 32-bit register that holds the 32 bit value that is loaded
into the counter.
Timer2 Clear Register
Name
Address
Default Value
Access
T2ICLR
0xFFFF034C
0x00
W
This 8-bit write-only MMR is written (with any value) by user
code to refresh (reload) Timer2.
Timer2 Value Register
Name
Address
Default Value
Access
T2VAL
0xFFFF0344
0x0000
R
T2VAL is a 32-bit register that holds the current value of Timer2.
Timer2 Control Register
Name
Address
Default Value
Access
T2CON
0xFFFF0348
0x0000
R/W
This 32-bit MMR configures the mode of operation for Timer2.
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