ST7LITE49K2 STMicroelectronics, ST7LITE49K2 Datasheet - Page 4
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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Contents
9
10
4/245
8.1
8.2
8.3
8.4
8.5
Power saving modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.1
9.2
9.3
9.4
9.5
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.1
10.2
10.3
10.4
10.5
10.6
10.7
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Masking and processing flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.2.1
8.2.2
Interrupts and low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Concurrent and nested management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Description of interrupt registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.5.1
8.5.2
8.5.3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Slow mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Wait mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Active-halt and Halt modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.4.1
9.4.2
Auto-wakeup from Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
9.5.1
9.5.2
9.5.3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
10.2.1
10.2.2
10.2.3
10.2.4
I/O port implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Unused I/O pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Device-specific I/O port configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Servicing pending interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Interrupt vector sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
CPU CC register interrupt bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Interrupt software priority registers (ISPRx) . . . . . . . . . . . . . . . . . . . . . . 59
External interrupt control register (EICR) . . . . . . . . . . . . . . . . . . . . . . . . 62
Active-halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Halt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
AWUFH control/status register (AWUCSR) . . . . . . . . . . . . . . . . . . . . . . 72
AWUFH prescaler register (AWUPR) . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Input modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Output modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Alternate functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Analog alternate function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
ST7LITE49K2
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