ST72F324BK4T3 STMicroelectronics, ST72F324BK4T3 Datasheet - Page 32

• Manufacturer Part Number: ST72F324BK4T3
• Description: IC MCU 8BIT 16K FLASH 32-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F324BK4T3

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: ST72F3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7232X-EVAL, ST7MDT20-DVP3, ST7MDT20J-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• A/d Bit Size: 10 bit
• A/d Channels Available: 12
• Height: 1.4 mm
• Length: 7 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3.8 V
• Width: 7 mm
• For Use With: 497-6421 - BOARD EVAL DGTL BATT CHGR DESIGN497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-8241; ST72F324BK4T3

Supply, reset and clock management
Figure 10. Clock, reset and supply block diagram
6.3
Caution:
6.3.1
32/198
RESET
OSC2
OSC1
V
V
DD
SS
Multi-oscillator (MO)
The main clock of the ST7 can be generated by three different source types coming from the
multi-oscillator block:
●
●
●
Each oscillator is optimized for a given frequency range in terms of consumption and is
selectable through the option byte. The associated hardware configurations are shown in
Table
The OSC1 and/or OSC2 pins must not be left unconnected. For the purposes of Failure
Mode and Effect Analysis, it should be noted that if the OSC1 and/or OSC2 pins are left
unconnected, the ST7 main oscillator may start and, in this configuration, could generate an
f
unsafe/undefined state. The product behavior must therefore be considered undefined when
the OSC pins are left unconnected.
External clock source
In this external clock mode, a clock signal (square, sinus or triangle) with ~50% duty cycle
has to drive the OSC1 pin while the OSC2 pin is tied to ground.
OSC
an external source
4 crystal or ceramic resonator oscillators
an internal high frequency RC oscillator
clock frequency in excess of the allowed maximum (> 16 MHz.), putting the ST7 in an
9. Refer to the electrical characteristics section for more details.
Reset Sequence
Oscillator
Multi-
(MO)
Manager
(RSM)
f
OSC
(option)
PLL
Doc ID13466 Rev 4
SICSR
0
System Integrity Management
AVD AVD LVD
IE
AVD Interrupt Request
F
Auxiliary Voltage
Low Voltage
RF
Detector
Detector
(AVD)
(LVD)
0
0
0
WDG
f
RF
OSC2
Clock (MCC/RTC)
with Real-time
timer (WDG)
Main Clock
Watchdog
Controller
ST72324B-Auto
f
CPU