ST72F561K9TA STMicroelectronics, ST72F561K9TA Datasheet - Page 176

• Manufacturer Part Number: ST72F561K9TA
• Description: IC MCU 8BIT 60K FLASH 32-LQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F561K9TA

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, LINSCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• 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: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: 497-8374 - BOARD DEVELOPMENT FOR ST72F561
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

ST72561
beCAN CONTROLLER (Cont’d)
10.9.4.2 Reception Handling
For the reception of CAN messages, three
mailboxes organized as a FIFO are provided. In
order to save CPU load, simplify the software and
guarantee data consistency, the FIFO is managed
completely by hardware. The application accesses
the messages stored in the FIFO through the FIFO
output mailbox.
Valid Message
Figure 101. Receive FIFO states
176/265
EMPTY
FMP=0x00
FOVR=0
Release
Mailbox
Valid Message
Received
Release
Mailbox
RFOM=1
Release
Mailbox
RFOM=1
PENDING_1
FMP=0x01
FOVR=0
PENDING_3
FMP=0x11
FOVR=0
PENDING_2
FMP=0x10
FOVR=0
A received message is considered as valid when it
has been received correctly according to the CAN
protocol (no error until the last but one bit of the
EOF field) and It passed through the identifier fil-
tering successfully, see
Filtering.
Valid Message
Received
Valid Message
Received
Release
Mailbox
RFOM=1
Valid Message
Received
Section 0.1.4.3 Identifier
Valid Message
Received
OVERRUN
FMP=0x11
FOVR=1