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参数资料
| 型号： | ST7PLU05MAE |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO8 |
| 封装： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 49/124页 |
| 文件大小： | 1995K |
| 代理商： | ST7PLU05MAE |
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Supply, reset and clock management
ST7LUS5, ST7LU05, ST7LU09
6.2.3
System integrity (SI) control/status register (SICSR)
6.2.4
Internal RC prescaler selection register (INTRCPRR)
SICSR
Reset value: 0000 0x00 (0xh)
7
654
32
10
Reserved
CR[1:0]
Reserved
LVDRF
Reserved
-
R/W
-
R/W
-
Table 9.
SICSR register description
Bit
Name
Function
7
-
Reserved, must be kept cleared.
6:5 CR[1:0]
RC Oscillator Frequency Adjustment bits
These bits, as well as CR[9:2] bits in the RCCR register must be written
immediately after reset to adjust the RC oscillator frequency and to obtain the
required accuracy. Refer to Section 6.1 on page 27.
4:3
-
Reserved, must be kept cleared.
2:0
LVDRF
System Integrity bits
1:0
-
Reserved, must be kept cleared.
INTRCPRR
Reset value: 0000 0011 (03h)
7
654
32
10
CK[2:0]
Reserved
R/W
-
Table 10.
INTRCPRR register description
Bit
Name
Function
7:5
CK[2:0]
Internal RC Prescaler Selection
These bits are set by software and cleared by hardware after a reset. These bits
select the prescaler of the internal RC oscillator as follows (see also Figure 9 on
000: fOSC =8MHz
001: fOSC =4MHz
010: fOSC =2MHz
011: fOSC =1MHz
100: fOSC = 500 kHz
Notes:
1. If the internal RC is used with a supply operating range below 3.3V, a division
ratio of at least 2 must be enabled in the RC prescaler.
2. Configuration '000' is not allowed at 3.3V operation.
4:0
-
Reserved, must be kept cleared.
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