ST7LIT15BF0 STMicroelectronics, ST7LIT15BF0 Datasheet - Page 46

• Manufacturer Part Number: ST7LIT15BF0
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, 5 TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7LIT15BF0

• Up To 4 Kbytes Single Voltage Extended Flash (xflash) 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.
• 128 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55˚C.
• Clock Sources: Internal 1% RC oscillator (on ST7FLITE15B and ST7FLITE19B), crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Auto Wake-up from Halt, Wait and Slow

ST7LITE1xB
POWER SAVING MODES (Cont’d)
Figure 31. AWUFH Mode Flow-chart
46/159
1
(AWUCSR.AWUEN=1)
HALT INSTRUCTION
(Active-Halt disabled)
N
WATCHDOG
WDGHALT
RESET
1
INTERRUPT
Y
1)
ENABLE
3)
256 OR 4096 CPU CLOCK
OR SERVICE INTERRUPT
0
FETCH RESET VECTOR
AWU RC OSC
AWU RC OSC
MAIN OSC
PERIPHERALS
CPU
MAIN OSC
PERIPHERALS
CPU
AWU RC OSC
MAIN OSC
PERIPHERALS
CPU
I[1:0] BITS
I[1:0] BITS
I[1:0] BITS
N
CYCLE
RESET
Y
WATCHDOG
DELAY
DISABLE
2)
XX
XX
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
5)
ON
ON
ON
ON
10
4)
4)
Notes:
1. WDGHALT is an option bit. See option byte sec-
tion for more details.
2. Peripheral clocked with an external clock source
can still be active.
3. Only an AWUFH interrupt and some specific in-
terrupts can exit the MCU from HALT mode (such
as external interrupt). Refer to Table 5, “Interrupt
Mapping,” on page 37 for more details.
4. Before servicing an interrupt, the CC register is
pushed on the stack. The I[1:0] bits of the CC reg-
ister are set to the current software priority level of
the interrupt routine and recovered when the CC
register is popped.
5. If the PLL is enabled by option byte, it outputs
the clock after an additional delay of t
Figure
13).
STARTUP
(see