ST7FMC2R6T6 STMicroelectronics, ST7FMC2R6T6 Datasheet - Page 130

• Manufacturer Part Number: ST7FMC2R6T6
• Description: MCU 8BIT 32K FLASH 64TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FMC2R6T6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: LINSCI, SPI
• Peripherals: LVD, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 32KB (32K 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: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Processor Series: ST7FMC2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MC-KIT/BLDC, ST7MDT50-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• For Use With: 497-8402 - BOARD EVAL COMPLETE INVERTER497-8400 - KIT IGBT PWR MODULE CTRL ST7MC497-6408 - BOARD EVAL BLDC SENSORLESS MOTOR497-4734 - EVAL KIT 3KW POWER DRIVER BOARD497-4733 - EVAL KIT 1KW POWER DRIVER BOARD497-4732 - EVAL KIT 300W POWER DRIVER BOARD497-4731 - EVAL KIT PWR DRIVER CONTROL BRD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-4868

ST7MC1xx/ST7MC2xx
LINSCI™ SERIAL COMMUNICATION INTERFACE (LIN Mode) (cont’d)
10.5.9.7 LINSCI Clock Tolerance
LINSCI Clock Tolerance when unsynchronized
When LIN slaves are unsynchronized (meaning no
characters have been transmitted for a relatively
long time), the maximum tolerated deviation of the
LINSCI clock is +/-15%.
If the deviation is within this range then the LIN
Synch Break is detected properly when a new re-
ception occurs.
This is made possible by the fact that masters
send 13 low bits for the LIN Synch Break, which
can be interpreted as 11 low bits (13 bits -15% =
11.05) by a “fast” slave and then considered as a
LIN Synch Break. According to the LIN specifica-
tion, a LIN Synch Break is valid when its duration
is greater than t
LIN Synch Break must last at least 11 low bits.
Note: If the period desynchronization of the slave
is +15% (slave too slow), the character “00h”
which represents a sequence of 9 low bits must
not be interpreted as a break character (9 bits +
15% = 10.35). Consequently, a valid LIN Synch
break must last at least 11 low bits.
LINSCI Clock Tolerance when Synchronized
When synchronization has been performed, fol-
lowing reception of a LIN Synch Break, the LINS-
CI, in LIN mode, has the same clock deviation tol-
erance as in SCI mode, which is explained below:
During reception, each bit is oversampled 16
times. The mean of the 8th, 9th and 10th samples
is considered as the bit value.
Figure 71.Bit Sampling in Reception Mode
130/309
1
RDI LINE
Sample
clock
SBRKTS
1
= 10. This means that the
2
3
4
7/16
5
6
7
sampled values
Consequently, the clock frequency should not vary
more than 6/16 (37.5%) within one bit.
The sampling clock is resynchronized at each start
bit, so that when receiving 10 bits (one start bit, 1
data byte, 1 stop bit), the clock deviation should
not exceed 3.75%.
10.5.9.8 Clock Deviation Causes
The causes which contribute to the total deviation
are:
All the deviations of the system should be added
and compared to the LINSCI clock tolerance:
D
8
One bit time
TRA
– D
– D
– D
– D
– D
Note: The transmitter can be either a master
or a slave (in case of a slave listening to the
response of another slave).
ment performed by the receiver.
tion of the receiver.
receiver: This deviation can occur during the
reception of one complete LIN message as-
suming that the deviation has been compen-
sated at the beginning of the message.
(generally due to the transceivers)
9
+ D
TRA
MEAS
QUANT
REC
TCL
: Deviation due to the transmission line
MEAS
: Deviation due to transmitter error.
: Deviation of the local oscillator of the
10
: Error due to the LIN Synch measure-
: Error due to the baud rate quantiza-
+D
11
QUANT
12
+ D
6/16
7/16
13
REC
14
+ D
15
TCL
< 3.75%
16