ST7L15 datasheet(41/138 Pages) STMICROELECTRONICS

Teilenummer	ST7L15

Bauteilbeschribung	8-bit MCU for automotive with single voltage Flash/ROM memory, data EEPROM, ADC, 5 timers, SPI

PDF	138 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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41 / 138 page

ST7L15, ST7L19

41/138

POWER SAVING MODES (cont’d)

Figure 28. AWUFH Mode Flowchart

Notes:

1. WDGHALT is an option bit. See option byte section for

more details.

2. Peripheral clocked with an external clock source can

still be active.

3. Only an AWUFH interrupt and some specific interrupts

can exit the MCU from HALT mode (such as external in-

terrupt). Refer to Table 5, “Interrupt Mapping,” on page 32

for more details.

4. Before servicing an interrupt, the CC register is pushed

on the stack. The I[1:0] bits of the CC register 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 the option byte, it outputs the

clock after an additional delay of tSTARTUP (see Figure 11).

RESET

INTERRUPT3)

CPU

MAIN OSC

PERIPHERALS2)

I[1:0] BITS

OFF

FETCH RESET VECTOR

OR SERVICE INTERRUPT

CPU

MAIN OSC

PERIPHERALS

I[1:0] BITS

OFF

XX4)

CPU

MAIN OSC

PERIPHERALS

I[1:0] BITS

XX4)

256 OR 4096 CPU CLOCK

DELAY5)

WATCHDOG

ENABLE

DISABLE

WDGHALT1)

WATCHDOG

RESET

CYCLE

AWU RC OSC

OFF

AWU RC OSC

OFF

HALT INSTRUCTION

(Active Halt disabled)

(AWUCSR.AWUEN=1)

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