ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 52

• Manufacturer Part Number: ST7LITE49K2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

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

Supply, reset and clock management
7.5.4
52/245
Bit 0 = AVDIE Voltage detector interrupt enable bit
AVD threshold selection register (AVDTHCR)
Bits 7:5 = CK[2:0] internal RC prescaler selection
Table 11.
Bits 4:2 = Reserved, must be cleared.
Bits 1:0 = AVD[1:0] AVD Threshold selection. These bits are used to select the AVD
threshold. They are set and cleared by software. They are set by hardware after a reset.
Table 12.
Reset value: 0000 0011 (003h)
CK2
CK2
AVD1
7
0
0
0
1
This bit is set and cleared by software. It enables an interrupt to be generated when the
AVDF flag is set. The pending interrupt information is automatically cleared when
software enters the AVD interrupt routine.
0: AVD interrupt disabled
1: AVD interrupt enabled
These bits are set by software and cleared by hardware after a reset. These bits select
the prescaler of the internal RC oscillator. See
diagram on page 41
If the internal RC is used with a supply operating range below 3.3 V, a division ratio of
at least 2 must be enabled in the RC prescaler.
0
0
1
1
Internal RC prescaler selection bits
others
AVD threshold selection bits
CK1
CK1
AVD0
0
1
1
0
0
1
0
1
CK0
CK0
and
1
0
1
0
Table
0
11.
Read/write
0
Functionality
Figure 13: Clock management block
Medium
AVD off
High
Low
f
f
f
f
f
RC/16
RC/2
RC/4
RC/8
OSC
f
0
RC
AVD1
ST7LITE49K2
AVD0
0