ST72321AR6-Auto STMicroelectronics, ST72321AR6-Auto Datasheet - Page 68

• Manufacturer Part Number: ST72321AR6-Auto
• Description: 8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR6-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

Power saving modes
68/243
Figure 28. Halt mode flowchart
1. WDGHALT is an option bit. See
2. Peripheral clocked with an external clock source can still be active.
3. Only some specific interrupts can exit the MCU from Halt mode (such as external interrupt). Refer to
4. Before servicing an interrupt, the CC register is pushed on the stack. The I[1:0] bits of the CC register are
Table 20: Interrupt mapping
set to the current software priority level of the interrupt routine and recovered when the CC register is
popped.
N
WATCHDOG
HALT INSTRUCTION
WDGHALT
(MCCSR.OIE = 0)
RESET
1
for more details.
INTERRUPT
Section 21.1.1: Flash configuration on page 223
Y
Doc ID 13829 Rev 1
(1)
(3)
ENABLE
0
256 OR 4096 CPU CLOCK
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
I[1:0] BITS
I[1:0] BITS
I[1:0] BITS
OR SERVICE INTERRUPT
N
FETCH RESET VECTOR
CYCLE
Y
RESET
WATCHDOG
DELAY
(2)
DISABLE
XX
XX
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
10
for more details.
(4)
(4)
ST72321xx-Auto