STR720 datasheet(260/401 Pages) STMICROELECTRONICS

部件名	STR720

功能描述	ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES

PDF	401 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

260 / 401 page

STR720 - CONTROLLER AREA NETWORK (CAN)

260/401

In this example, the concatenated bit time parameters are (2-1)3&(7-1)4&(1-1)2&(1-1)6, the Bit

Timing Register is programmed to= 0x1600.

Example for Bit Timing at Low Baudrate

In this example, the frequency of APB_CLK is 2 MHz, BRP is 1, the bit rate is 100 KBit/s.

In this example, the concatenated bit time parameters are (4-1)3&(5-1)4&(4-1)2&(2-1)6, the Bit

Timing Register is programmed to= 0x34C1.

µs= 2 •t

APB_CLK

delay of bus driver

200

delay of receiver circuit

delay of bus line (40m)

220

tProp

µs= 1 • t

tSJW

µs= 4 • t

tTSeg1

µs= t

Prop + tSJW

tTSeg2

µs

= Information Processing Time + 3 • tq

tSync-Seg

µs= 1 • t

bit time

µs= t

Sync-Seg + tTSeg1 + tTSeg2

tolerance for APB_CLK

1.58

min PB1 PB2

()

2x 13x bit time

PB2

–

()

---------------------------------------------------------------

4µs

2x 13x 10

µs 4µs

–

()

----------------------------------------------------------

STR720 数据表(PDF) 260 Page - STMicroelectronics

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