ST72C334N2B6 STMicroelectronics, ST72C334N2B6 Datasheet - Page 27

• Manufacturer Part Number: ST72C334N2B6
• Description: Microcontrollers (MCU) Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334N2B6

• 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: 44
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Package / Case: SDIP-56
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

RESET SEQUENCE MANAGER (Cont’d)
External RESET pin
The RESET pin is both an input and an open-drain
output with integrated R
This pull-up has no fixed value but varies in ac-
cordance with the input voltage. It can be pulled
low by external circuitry to reset the device.
Figure 16. External RESET Sequences
V
V
V
V
LVDf
LVDf
DDnominal
DDnominal
V
V
DD
DD
RUN
RUN
t
t
PULSE
PULSE
ON
weak pull-up resistor.
t
DE LAYmin
DELAY
4096 CLOCK CYCLES
INTERNAL RESET
RESET
DELAY
RESET
A RESET signal originating from an external
source must have a duration of at least t
order to be recognized. Two RESET sequences
can be associated with this RESET source as
shown in Figure 16.
Starting from the external RESET pulse recogni-
tion, the device RESET pin acts as an output that
is pulled low during at least t
VECTOR
FETCH
ST72334J/N, ST72314J/N, ST72124J
4096 CLOCK CYCLES
INTERNAL RESET
VECTOR
FETCH
RUN
DELAYmin
EXTERNAL RESET SOURCE
EXTERNAL RESET SOURCE
WATCHDOG RESET
WATCHDOG RESET
RUN
.
RESET PIN
RESET PIN
PULSE
27/125
in