ST72F561J4T6 STMicroelectronics, ST72F561J4T6 Datasheet - Page 22

• Manufacturer Part Number: ST72F561J4T6
• Description: IC MCU 8BIT 16K FLASH 44-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F561J4T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, LINSCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-LQFP
• Processor Series: ST72F5x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: CAN, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• For Use With: 497-8374 - BOARD DEVELOPMENT FOR ST72F561
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

ST72561
6.2 MULTI-OSCILLATOR (MO)
The main clock of the ST7 can be generated by
two 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
configuration are shown in
electrical characteristics section for more details.
Caution: 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 con-
figuration, could generate an f
in excess of the allowed maximum (> 16 MHz),
putting the ST7 in an unsafe/undefined state. The
product behavior must therefore be considered
undefined when the OSC pins are left unconnect-
ed.
External Clock Source
In external clock mode, a clock signal (square, si-
nus or triangle) with ~50% duty cycle has to drive
the OSC1 pin while the OSC2 pin is tied to ground.
Crystal/Ceramic Oscillators
This family of oscillators has the advantage of pro-
ducing a very accurate rate on the main clock of
the ST7. The selection within a list of five oscilla-
tors with different frequency ranges must be done
by option byte in order to reduce consumption (re-
fer to
22/265
an external source
a crystal or ceramic resonator oscillator
Section 14.1 on page 252
Table
OSC
for more details on
clock frequency
6. Refer to the
the frequency ranges). The resonator and the load
capacitors must be placed as close as possible to
the oscillator pins in order to minimize output dis-
tortion and start-up stabilization time. The loading
capacitance values must be adjusted according to
the selected oscillator.
These oscillators are not stopped during the
RESET phase to avoid losing time in the oscillator
start-up phase.
Table 6. ST7 Clock Sources
C
L1
EXTERNAL
Hardware Configuration
SOURCE
OSC1
OSC1
CAPACITORS
LOAD
ST7
ST7
OSC2
OSC2
C
L2