ST72F321AR9TA STMicroelectronics, ST72F321AR9TA Datasheet - Page 30

• Manufacturer Part Number: ST72F321AR9TA
• Description: IC MCU 8BIT 60KB FLASH 64-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F321AR9TA

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

ST72321Rx ST72321ARx ST72321Jx
SYSTEM INTEGRITY MANAGEMENT (Cont’d)
6.4.2.2 Monitoring a Voltage on the EVD pin
This mode is selected by setting the AVDS bit in
the SICSR register.
The AVD circuitry can generate an interrupt when
the AVDIE bit of the SICSR register is set. This in-
terrupt is generated on the rising and falling edges
Figure 17. Using the Voltage Detector to Monitor the EVD pin (AVDS bit=1)
6.4.3 Low Power Modes
6.4.3.1 Interrupts
The AVD interrupt event generate an interrupt if
the corresponding Enable Control Bit (AVDIE) is
30/193
WAIT
HALT
AVDF
AVD INTERRUPT
REQUEST
IF AVDIE = 1
Mode
V
V
IT+(EVD)
IT-(EVD)
No effect on SI. AVD interrupts cause the
device to exit from Wait mode.
The SICSR register is frozen.
V
EVD
0
Description
INTERRUPT PROCESS
V
hyst
1
of the comparator output. This means it is generat-
ed when either one of these two events occur:
The EVD function is illustrated in
For more details, refer to the Electrical Character-
istics section.
set and the interrupt mask in the CC register is re-
set (RIM instruction).
AVD event
– V
– V
Interrupt Event
EVD
EVD
rises up to V
falls down to V
Event
AVDF
Flag
IT+(EVD)
IT-(EVD)
Control
Enable
AVDIE
Bit
INTERRUPT PROCESS
Figure
0
from
Wait
Exit
Yes
17.
from
Exit
Halt
No