参数资料
型号: ST7PL35F2UA/XXXE
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
封装: 5 X 6 MM, ROHS COMPLIANT, QFN-20
文件页数: 18/168页
文件大小: 2955K
代理商: ST7PL35F2UA/XXXE
Obsolete
Product(s)
- Obsolete
Product(s)
ST7L34, ST7L35, ST7L38, ST7L39
114/168
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
will effectively update LDIV and so the clock gen-
eration.
2. In LIN Slave mode, if the LPR[7:0] register is
equal to 00h, the transceiver and receiver input
clocks are switched off.
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
70
000
0
LPFR
3
LPFR
2
LPFR
1
LPFR
0
LPFR[3:0]
Fraction (LDIV)
0h
0
1h
1/16
...
Eh
14/16
Fh
15/16
相关PDF资料
PDF描述
ST7L35F2UA/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7L35F2UC/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7L39F2MC/XXXE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
ST7L39F2UC/XXXRE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, QCC20
ST7PL34F2MC/XXXE 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
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