ST72C334N2T6 STMicroelectronics, ST72C334N2T6 Datasheet - Page 28

• Manufacturer Part Number: ST72C334N2T6
• Description: Microcontrollers (MCU) Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334N2T6

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: In Transition

ST72334J/N, ST72314J/N, ST72124J
RESET SEQUENCE MANAGER (Cont’d)
Internal Low Voltage Detection RESET
Two different RESET sequences caused by the in-
ternal LVD circuitry can be distinguished:
Figure 17. LVD RESET Sequences
28/125
Power-On RESET
V
V
V
V
V
DDnominal
LVDr
DDnominal
LVDr
LVDf
V
V
DD
DD
RUN
DELAY
DELAY
RESET
RESET
The device RESET pin acts as an output that is
pulled low when V
V
DD
Voltage Drop RESET
<V
LVDf
4096 CLOCK CYCLES
4096 CLOCK CYCLES
INTERNAL RESET
INTERNAL RESET
(falling edge) as shown in Figure 9.
DD
VECTOR
VECTOR
FETCH
FETCH
<V
LVDr
EXTERNAL RESET SOURCE
EXTERNAL RESET SOURCE
(rising edge) or
WATCHDOG RESET
WATCHDOG RESET
RUN
RUN
RESET PIN
RESET PIN