參數(shù)資料
型號: ADUC7023BCP6Z62IRL
廠商: Analog Devices Inc
文件頁數(shù): 83/96頁
文件大小: 0K
描述: IC MCU 12BIT 62KB FLASH 40LFCSP
標準包裝: 2,500
系列: MicroConverter® ADuC7xxx
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 44MHz
連通性: I²C,SPI
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 20
程序存儲器容量: 64KB(32K x 16)
程序存儲器類型: 閃存
RAM 容量: 2K x 32
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉換器: A/D 12 x12b; D/A 4x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 40-VFQFN 裸露焊盤,CSP
包裝: 帶卷 (TR)
ADuC7023
Data Sheet
| Page 84 of 96
The Timer0 interface consists of four MMRs: T0LD, T0VAL,
T0CON, and T0CLRI.
T0LD Register
Name:
T0LD
Address:
0xFFFF0300
Default value:
0x0000
Access:
Read/write
T0LD is a 16-bit load register that holds the 16-bit value that is
loaded into the counter.
T0VAL Register
Name:
T0VAL
Address:
0xFFFF0304
Default Value:
0xFFFF
Access:
Read
T0VAL is a 16-bit read-only register representing the current
state of the counter.
T0CON Register
Name:
T0CON
Address:
0xFFFF0308
Default value:
0x0000
Access:
R/W
T0CON is the configuration MMR described in Table 102.
Table 102. T0CON MMR Bit Descriptions
Bit
Value
Description
15 to 8
Reserved.
7
Timer0 enable bit.
This bit is set by the user to enable Timer0. This
bit is cleared by the user to disable Timer0 by
default.
6
Timer0 mode.
This bit is set by the user to operate in
periodic mode.
This bit is cleared by the user to operate in
free-running mode. Default mode.
5 to 4
Clock select bits.
00
HCLK.
01
UCLK.
10
Internal 32768 Hz oscillator.
11
Reserved.
3 to 2
00
Source clock/1. Default value.
01
Source clock/16.
10
Source clock/256.
11
Undefined. Equivalent to 00.
1 to 0
Reserved.
T0CLRI Register
Name:
T0CLRI
Address:
0xFFFF030C
Default value:
0xXX
Access:
Write
T0CLRI is an 8-bit register. Writing any value to this register
clears the interrupt.
The following is the recommended procedure for servicing the
Timer 0 interrupt:
void
IRQ_Handler(void) __irq
{
if(IRQSTA & BIT2) // Timer0 IRQ?
{
T0CLRI = 0;
//clear Timer0 interrupt
T0CON = 0x00; //disable Timer0 interrupt
T0CON = 0xC8; //enable Timer0 interrupt
}
Timer1 (General-Purpose Timer)
Timer1 is a general-purpose, 32-bit timer (count down or count
up) with a programmable prescaler. The source can be the 32 kHz
external crystal, the undivided system, the core clock, or P1.1
(maximum frequency 44 MHz). This source can be scaled by a
factor of 1, 16, 256, or 32,768.
The counter can be formatted as a standard 32-bit value or as
hours, minutes, seconds, hundredths.
Timer1 has a capture register (T1CAP) that can be triggered by
a selected IRQ source initial assertion. This feature can be used
to determine the assertion of an event more accurately than the
precision allowed by the RTOS timer when the IRQ is serviced.
Timer1 can be used to start ADC conversions as shown in the
block diagram in Figure 43.
08675-
037
32kHz OSCILLATOR
HCLK
UCLK
P1.1
IRQ[19:0]
PRESCALER
/1, 16, 256,
OR 32,768
32-BIT
UP/DOWN
COUNTER
32-BIT
LOAD
TIMER1
VALUE
CAPTURE
TIMER1 IRQ
ADC CONVERSION
Figure 43. Timer1 Block Diagram
The Timer1 interface consists of five MMRs: T1LD, T1VAL,
T1CON, T1CLRI, and T1CAP.
Rev. E
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