ST7LITE49M STMicroelectronics, ST7LITE49M Datasheet - Page 3
ST7LITE49M
Manufacturer Part Number
ST7LITE49M
Description
8-bit MCU
Manufacturer
STMicroelectronics
Datasheet
1.ST7LITE49M.pdf
(187 pages)
Specifications of ST7LITE49M
4 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
128 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
A/d Converter
10 input channels
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ST7LITE49M
6
7
8
Central processing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1
6.2
6.3
Supply, reset and clock management . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.1
7.2
7.3
7.4
7.5
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CPU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
RC oscillator adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.1.1
7.1.2
Multi-oscillator (MO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.2.1
7.2.2
7.2.3
Reset sequence manager (RSM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
System integrity management (SI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.4.1
7.4.2
7.4.3
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
Accumulator (A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Index registers (X and Y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Program counter (PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condition code register (CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Stack pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Internal RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Auto-wakeup RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
External clock source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Crystal/ceramic oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Internal RC oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Asynchronous external RESET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
External power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Internal low voltage detector (LVD) reset . . . . . . . . . . . . . . . . . . . . . . . . 39
Internal watchdog reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Low voltage detector (LVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Auxiliary voltage detector (AVD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Main clock control/status register (MCCSR) . . . . . . . . . . . . . . . . . . . . . 44
RC control register (RCCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
System integrity (SI) control/status register (SICSR) . . . . . . . . . . . . . . . 45
AVD threshold selection register (AVDTHCR) . . . . . . . . . . . . . . . . . . . . 46
Clock controller control/status register (CKCNTCSR) . . . . . . . . . . . . . . 47
Doc ID 13562 Rev 3
Contents
3/188
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