ST7FMC2R7T6 STMicroelectronics, ST7FMC2R7T6 Datasheet - Page 135

• Manufacturer Part Number: ST7FMC2R7T6
• Description: MCU 8BIT 48K FLASH 64TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST7FMC2R7T6

• 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: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K 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: 1536 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 5
• Operating Supply Voltage: 4.5 V to 5.5 V
• 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
• 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: 497-4869

LINSCI™ SERIAL COMMUNICATION INTERFACE (LIN Mode) (cont’d)
LIN PRESCALER FRACTION REGISTER
(LPFR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:4 = Reserved.
Bits 3:0 = LPFR[3:0] Fraction of LDIV
These 4 bits define the fraction of the LIN Divider
(LDIV):
1. When initializing LDIV, the LPFR register must
be written first. Then, the write to the LPR register
7
0
LPFR[3:0]
Eh
Fh
0h
1h
...
0
0
0
Fraction (LDIV)
LPFR
3
14/16
15/16
1/16
...
0
LPFR
2
LPFR
1
LPFR
0
0
will effectively update LDIV and so the clock gen-
eration.
2. In LIN Slave mode, if the LPR[7:0] register is
Examples of LDIV coding:
Example 1: LPR = 27d and LPFR = 12d
This leads to:
Mantissa (LDIV) = 27d
Fraction (LDIV) = 12/16 = 0.75d
Therefore LDIV = 27.75d
Example 2: LDIV = 25.62d
This leads to:
LPFR = rounded(16*0.62d)
= rounded(9.92d) = 10d = Ah
LPR = mantissa (25.620d) = 25d = 1Bh
Example 3: LDIV = 25.99d
This leads to:
LPFR = rounded(16*0.99d)
= rounded(15.84d) = 16d
equal to 00h, the transceiver and receiver input
clocks are switched off.
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