Controller Area Network (CAN) - The HCS12/9S12: An Introduction to Software and Hardware Interfacing - page 669

V DD

3

TXD
dominant
detect

V DD

Thermal
shutdown

1

TxD

Driver
control

7

Power-
on reset

CANH

Slope
control

R S

V DD

8

RxD Receiver

4

GND

6

CANL

Reference
voltage

V REF

5

2

Figure 13.43 ■ The block diagram of Microchip MCP2551

25

20

15

10

5

0
10

20 30 40 49 60 70 80 90 100 110

Resistance (k Ω )

Figure 13.44 ■ Slew rate versus slope control resistance value