ST7LITE20F2 STMicroelectronics, ST7LITE20F2 Datasheet - Page 35

• Manufacturer Part Number: ST7LITE20F2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7LITE20F2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55˚C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

INTERRUPTS (Cont’d)
Figure 20. Interrupt Processing Flowchart
Table 5. Interrupt Mapping
Note 1: This interrupt exits the MCU from “Auto Wake-up from Halt” mode only.
N°
10
11
12
13
0
1
2
3
4
5
6
7
8
9
FROM RESET
LITE TIMER LITE TIMER RTC2 interrupt
LITE TIMER
AT TIMER
Source
RESET
Block
TRAP
AWU
SPI
ei0
ei1
ei2
ei3
SI
External Interrupt 1
External Interrupt 2
External Interrupt 3
Reset
Software Interrupt
Auto Wake Up Interrupt
External Interrupt 0
Not used
AVD interrupt
AT TIMER Output Compare Interrupt
or Input Capture Interrupt
AT TIMER Overflow Interrupt
LITE TIMER Input Capture Interrupt
LITE TIMER RTC1 Interrupt
SPI Peripheral Interrupts
Not usedNot used
EXECUTE INSTRUCTION
Description
RESTORE PC, X, A, CC FROM STACK
THIS CLEARS I BIT BY DEFAULT
FETCH NEXT INSTRUCTION
N
I BIT SET?
PWMxCSR
or ATCSR
AWUCSR
IRET?
Register
LTCSR2
SPICSR
ATCSR
LTCSR
LTCSR
SICSR
Label
N/A
N/A
Y
Y
Priority
N
Highest
Priority
Lowest
Priority
Order
LOAD PC FROM INTERRUPT VECTOR
HALT or
AWUFH
N
from
yes
Exit
yes
yes
yes
STACK PC, X, A, CC
no
no
no
1)
INTERRUPT
PENDING?
SET I BIT
ACTIVE
-HALT
from
Exit
yes
yes
yes
no
no
no
no
Y
FFECh-FFEDh
FFFCh-FFFDh
FFEAh-FFEBh
FFFAh-FFFBh
FFEEh-FFEFh
FFFEh-FFFFh
FFE8h-FFE9h
FFE6h-FFE7h
FFE4h-FFE5h
FFE2h-FFE3h
FFE0h-FFE1h
FFF8h-FFF9h
FFF6h-FFF7h
FFF4h-FFF5h
FFF2h-FFF3h
FFF0h-FFF1h
ST7LITE2
Address
Vector
35/133
1