J1850+_BUS
is pulled HIGH to 5V and J1850-_BUS
is pulled LOW to 0V.J1850_PWM_VPW
(M2 board signal name "J1850_PWM_nVPW")J1850+_BUS
connects to pin 2 on the OBD2 port and is used by BOTH J1850 PWM and VPW.J1850-_BUS
connects to pin 10 on the OBD2 port and is used by J1850 PWMJ1850P_TX
(M2 board signal name "J1850+_TX") is an OUTPUT from the processor used for BOTH J1850 PWM and VPW. "J1850+_TX" is connected to pin 45 or PC18. This corresponds to the PWMH6 on peripheral B.J1850N_TX
(M2 board signal name "J1850-_TX") is an OUTPUT from the processor and is used for J1850 PWM. "J1850-_TX" is connected to pin 7 or PC23. This corresponds to the PWML6 on peripheral B.J1850_PWM_RX
is an INPUT to the processor. "J1850_PWM_RX" is connected to pin 3 or PC28. This corresponds to the TIOA7 on peripheral B.J1850_VPW_RX
is an INPUT to the processor. "J1850_VPW_RX" is connected to pin 4 or PC26. This corresponds to the TIOB6 on peripheral B.