ST72F521M9T6 STMicroelectronics, ST72F521M9T6 Datasheet - Page 138

• Manufacturer Part Number: ST72F521M9T6
• Description: IC MCU 8BIT 60K FLASH 80-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F521M9T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, LINSCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 64
• 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: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Processor Series: ST72F5x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 2048 B
• Interface Type: CAN, I2C, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 64
• Number Of Timers: 5
• Operating Supply Voltage: 3.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• For Use With: 497-6453 - BOARD EVAL BASED ON ST7LNBX497-5046 - 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: 497-8244; ST72F521M9T6

ST72F521, ST72521B
CONTROLLER AREA NETWORK (Cont’d)
CONTROL/STATUS REGISTER (CSR)
Read/Write
Reset Value: 00h
Bit 6 = BOFF Bus-Off State
−
Set by hardware to indicate that the node is in bus-
off state, i.e. the Transmit Error Counter exceeds
255.
Reset by hardware to indicate that the node is in-
volved in bus activities.
Bit 5 = EPSV Error Passive State
−
Set by hardware to indicate that the node is error
passive.
Reset by hardware to indicate that the node is either
error active (BOFF = 0) or bus-off.
Bit 4 = SRTE Simultaneous Receive/Transmit En-
able
Set by software to enable simultaneous transmis-
sion and reception of a message passing the ac-
ceptance filtering. Allows to check the integrity of
the communication path.
Reset by software to discard all messages trans-
mitted by the node. Allows remote and data frames
to share the same identifier.
138/215
Read Only
Read Only
7
0
−
BOFF EPSV SRTE NRTX FSYN WKPS
Read/Set/Clear
RUN
0
Bit 3 = NRTX No Retransmission
−
Set by software to disable the retransmission of un-
successful messages. It does not stop transmission
in case of Arbitration Lost.
Cleared by software to enable retransmission of
messages until success is met.
Bit 2 = FSYN Fast Synchronization
−
Set by software to enable a fast resynchronization
when leaving standby mode, i.e. wait for only 11 re-
cessive bits in a row.
Cleared by software to enable the standard resyn-
chronization when leaving standby mode, i.e. wait
for 128 sequences of 11 recessive bits.
Bit 1 = WKPS Wake-up Pulse
−
Set by software to generate a dominant pulse when
leaving standby mode.
Cleared by software for no dominant wake-up
pulse.
Bit 0 = RUN CAN Enable
−
Set by software to leave standby mode after 128 se-
quences of 11 recessive bits or just 11 recessive
bits if FSYN is set.
Cleared by software to request a switch to the
standby or low-power mode as soon as any on-go-
ing transfer is complete. Read-back as 1 in the
meantime to enable proper signalling of the standby
state. The CPU clock may therefore be safely
switched OFF whenever RUN is read as 0.
Read/Set/Clear
Read/Set/Clear
Read/Set/Clear
Read/Set/Clear