BR16F84-1.07中文資料ETC數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION:

This device is a CMOS microcontroller which is designed to interface a personal computer or laptop with a

vehicle's On Board Diagnostic (OBD II) interface. It is intended to function with all three of the protocols used

by vehicle manufacturers to implement the OBD II system as defined by SAE and ISO specifications. The

OBD II system became mandatory for 1996 and up vehicles, but some vehicles were already fully or partially

compatible with OBD II requirements prior to 1996. The chip is not suitable for the earlier vehicles such as

OBD I.

The device is intended to function as a simple scan tool and is capable of sending and receiving any OBD II

message defined in SAE J1979 for any of the three types of OBDII bus implementations (PWM, VPW, ISO

9141-2). It can also be used as an inexpensive interface for custom instrumentation monitoring various

vehicle parameters such as speed, RPM, coolant or intake air temperature, engine load, intake air flow rate,

etc.

FEATURES:

Operating Voltage 5.0 V

Operating Current 5 Ma. Typ

Clock: 20 MHz

Inputs: (0-5V levels)

Serial Input (19200 Baud)

PWM receive

VPW receive

ISO 9141-2

Outputs (0-5V levels)

Serial output (19200 Baud)

PWM transmit bus+ (inverted)

PWM transmit bus- (inverted)

VPW transmit

ISO 9141-2 L line transmit (inverted)

ISO 9141-2 K line transmit (inverted)