參數(shù)資料
型號: ST52510F3M6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PDSO20
封裝: SOP-20
文件頁數(shù): 84/136頁
文件大?。?/td> 3335K
代理商: ST52510F3M6
Obsolete
Product(s)
- Obsolete
Product(s)
Internal Oscillator Calibration (OSC_SET)
Option Byte 2 (02h)
Bit 7-6: Not Used
Bit 5-0: OSPAR5-0 Internal Oscillator Parameters
These bits are used in order to calibrate the
precision of the internal oscillator working
at 10 MHz. The six bits enable some
current generators with steps of 0.05 μA
corresponding to interval of frequency of
100KHz.
Warning: the maximum configuration value
allowed is 101000 (40). The value corresponding
to the 10 MHz by design is 010100 (20). Loading
values over 40 the oscillator is stopped.
PLVD Control Register (PLVD_CR)
Option Byte 3 (03h)
Bit 7-2: Not Used
Bit 1-0: PLVD1-0 PLVD detection levels
00: Lowest detection level
01: Highest detection level
10: PLVD disabled
11: Medium detection level
Wake-Up Time Prescaler (WAKEUP)
Option Byte 7 (07h)
Bit 7-0: WK7-0 Wake-up prescaler
This byte determinates the time delay for
the stabilization of the oscillator after an
External Reset or a POR and after the
wake-up from Halt. The time delay is
computed according to the following
formula:
Warning: If the internal clock is used as clock
source the prescaler is not used.
Table 6.1 Recommended Gain Stages for the most common frequencies
Frequency
Recommend
Gain Stages 1)
CKPAR2-0
Oscillation
Start Times 2)
Settling Times for
40% duty-cycle 2)
External Clock
0
000
-
1 MHz
1
001
367
μs
27
μs
4 MHz
1
001
84
μs
10
μs
8 MHz
3
011
75
μs9 μs
10 MHz
3
011
79
μs5 μs
12 MHz
6
101
110
μs8 μs
16 MHz
6
101
352
μs7 μs
20 MHz
8
111
165
μs11μs
(1) The recommended values have been chosen to have the best tradeoff between start time and current
consumption. Higher gains give shorter Start times; lower gains give less current consumption.
(2) Indicative values by design at 25° Celsius, VDD=2.6 V. Not Tested in production.
70
-
OSPAR5 OSPAR4 OSPAR3 OSPAR2 OSPAR1 OSPAR0
70
---
PLVD1
PLVD0
70
WK7
WK6
WK5
WK4
WK3
WK2
WK1
WK0
Delay
4096
WAKEUP 1
+
() Tclk
×
=
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