ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 73
ST7LITE49K2
Manufacturer Part Number
ST7LITE49K2
Description
8-bit MCU
Manufacturer
STMicroelectronics
Datasheet
1.ST7LITE49K2.pdf
(245 pages)
Specifications of ST7LITE49K2
8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance
10K write/erase cycles guaranteed Data retention
256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention
20 years at 55 °C.
Clock Sources
Internal trimmable 8 MHz RC oscillator, auto-wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
Five Power Saving Modes
Halt, Active-halt, Auto-wakeup from Halt, Wait and Slow
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ST7LITE49K2
9.5.3
Note:
Table 22.
Address
(Hex.)
0048h
0049h
AWUCSR
Register
AWUPR
Reset
Reset
Value
Value
AWUFH prescaler register (AWUPR)
Reset value: 1111 1111 (FFh)
Bits 7:0= AWUPR[7:0] Auto-wakeup prescaler
Table 21.
In AWU mode, the time during which the MCU stays in Halt mode, t
equation below. See also
The AWUPR prescaler register can be programmed to modify the time during which the
MCU stays in Halt mode before waking up automatically.
If 00h is written to AWUPR, the AWUPR remains unchanged.
AWU register mapping and reset values
label
AWUPR7
These 8 bits define the AWUPR Dividing factor (see
7
AWUPR7
AWUPR[7:0
7
0
1
Configuring the dividing factor
AWUPR6
FEh
FFh
00h
01h
...
AWUPR6
]
6
0
1
AWUPR5
t
Figure 32 on page
AWU
AWUPR5
=
64
5
0
1
AWUPR4
×
AWUPR
Read/Write
AWUPR4
4
0
1
70.
×
AWUPR3
--------------------
f
AWURC
AWUPR3
1
3
0
1
Dividing factor
+
Forbidden
Table
t
AWUPR2
RCSTRT
254
255
...
1
AWUPR2
AWUF
21).
2
1
AWU
Power saving modes
AWUPR1
, is given by the
AWUPR1
AWUM
1
1
AWUPR0
AWUPR0
AWUEN
0
73/245
0
1
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