参数资料
型号: ADUC7033BSTZ-88-RL
厂商: Analog Devices Inc
文件页数: 70/140页
文件大小: 0K
描述: IC BATT SENSOR PREC 48LQFP
标准包装: 2,000
功能: 电池监控器
电源电压: 3.5 V ~ 18 V
工作温度: -40°C ~ 115°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
ADuC7033
User code then reads back the value of the low power oscillator
OSC0TRM Register
calibration counter. There are three possible scenarios:
Name:
OSC0TRM
?
?
?
OSC0VAL0 = OSC0VAL1. No further action is required.
OSC0VAL0 > OSC0VAL1. The low power oscillator is
running slow. OSC0TRM must be decreased.
OSC0VAL0 < OSC0VAL1. The low power oscillator is
running fast. OSC0TRM must be increased.
Address:
Default
Value:
Access:
0xFFFF042C
0xX8
Read/write
When the OSC0TRM is changed, the routine should be run
again and the new frequency checked.
Function:
This 8-bit register controls the low power
Using the internal, precision 131 kHz oscillator, it takes
approximately 4 ms to execute the calibration routine. If the
external 32.768 kHz crystal is used, the time increases to 16 ms.
oscillator trim.
Table 47. OSC0TRM MMR Bit Designations
Bit Description
Prior to the clock calibration routine being started, it is required
that the user switch to either the precision 131 kHz oscillator or
the external 32.768 kHz watch crystal to serve as the PLL clock
7 to 4
3 to 0
Reserved. Should be written as zeros.
User Trim Bits.
source. If this is not done, the PLL can lose lock each time
OSC0TRM is modified. This increases the length of time it
OSC0CON Register
takes to calibrate the low power oscillator.
BEGIN
CALIBRATION
ROUTINE
WHILE
OSC0STA[0] = 1
Name:
Address:
Default
Value:
Access:
OSC0CON
0xFFFF0440
0x00
Read/write
OSC0VAL0 < OSC0VAL1
OSC0VAL0 > OSC0VAL1
Function:
This 8-bit register controls the low power
oscillator calibration routine.
OSC0VAL0 = OSC0VAL1
Table 48. OSC0CON MMR Bit Designations
Bit
Description
INCREASE
OSC0TRM
DECREASE
OSC0TRM
7 to 5
4
Reserved. Should be written as 0.
Calibration Source.
Set to select external 32.768 kHz crystal.
Cleared to select internal precision 131 kHz
NO
IS ERROR WITHIN
DESIRED LEVEL?
3
oscillator.
Calibration Reset. Set to reset the calibration
YES
2
1
counters and disable the calibration logic.
Set to Clear OSC0VAL1.
Set to Clear OSC0VAL0.
END
CALIBRATION
ROUTINE
Figure 30. OSC0TRM Calibration Routine
0
Rev. B | Page 70 of 140
Calibration Enable.
Set to begin calibration.
Cleared to abort calibration.
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