PIC16LC433T-I/SO Microchip Technology, PIC16LC433T-I/SO Datasheet - Page 35

• Manufacturer Part Number: PIC16LC433T-I/SO
• Description: IC MCU CMOS 8BIT 10MHZ 2K 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16LC433T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN (Local Interconnect Network)
• Peripherals: POR, WDT
• Number Of I /o: 6
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6.0
The PIC16C433 has an integrated LIN bus transceiver,
which allows the microcontroller to communicate via a
LIN bus. The LIN bus protocol is handled by the micro-
controller. The conversion from 5V signal to LIN bus
signals is handled by the transceiver
6.1
The LIN bus protocol is not described within this docu-
ment. For further information regarding the LIN bus
protocol, please refer to www.lin-subbus.de.
6.2
The LIN bus will be transmitted by toggling the LINTX
bit in the LININTF register. Data transmitted on the LIN
bus is read by checking the LINRX bit in the PORTA
register.
For a LIN bus Slave software implementation, please
refer to AN729.
6.3
Figure 6-1shows how to implement a hardware LIN bus
interface for the PIC16C433.
An external 45V zener diode between V
with a 500
and the V
transients.
FIGURE 6-1:
2001 Microchip Technology Inc.
LIN bus TRANSCEIVER
The LIN bus Protocol
LIN bus Interfacing
LIN bus Hardware Interface
BB
pin, protects the PIC16C433 from power
resistor in series with the battery supply
TYPICAL LIN bus APPLICATION
V
V
+5
SS
DD
BB
LIN bus
V
and ground,
BAT
Advance Information
500
+12
V
BB
5.0nf
An external reverse battery blocking diode is used to
provide polarity protection.
6.4
In thermal shut-down, the LIN bus output is disabled
instantaneously. The output transistor is turned off,
regardless of the input level at pin LINTX bit and only a
limited current can flow into the receiver connected to
the LIN bus pin.
6.5
The PIC16C433 can wake-up from SLEEP upon bus
activity in the following way:
1.
The BACT signal is a mirror of the LIN bus. This signal
can be routed to GP2/T0CKI/AN2/INT pin. The GP2/
T0CKI/AN2/INT interrupt wakes up the device from
SLEEP.
Note:
Connect BACT to GP2/T0CKI/AN2/INT.
45V
10nf
Thermal Shut-down
Wake-up from SLEEP upon Bus
Activity
27V
TLINRX must be set to ‘1’ at all times.
Rmaster = 900 to 1.1k
Rslave = 20k to 42k
LIN bus
PIC16C433
DS41139A-page 33