APGRD004 Microchip Technology, APGRD004 Datasheet - Page 22

• Manufacturer Part Number: APGRD004
• Description: REF DESIGN MOD AUTO AMBNT LIGHT
• Manufacturer: Microchip Technology

Specifications of APGRD004

• Main Purpose: Lighting, RGB LED Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP2021, PIC12F615
• Primary Attributes: 4 Tiny Boards, Each Have: RGB LED, LIN Transceiver, Voltage Regulator, MCU
• Secondary Attributes: LIN Commands are Interpreted to Control 16,383 Colors and 1,023 Dimming Levels
• Silicon Manufacturer: Microchip
• Silicon Core Number: APGDT001
• Kit Contents: 4 Ambient Lighting Modules, Documentation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE B-1:
DS51714A-page 18
Interior Ambient Lighting Module with LIN Interface User’s Guide
MESSAGE_COUNTER
Measure Length of Each
MESSAGE_COUNTER
LIN_HANDLER
and Store in Counter
Calculate Baud Rate
= Data Length + 1
Receive Buffer
bit in Sync Char
Put Data into
YES
Decrement
Break char
YES
Next char
received?
Next char
received?
received?
ID = Char
Receive
Stop bit
frame?
valid?
done?
Is ID
YES
YES
YES
YES
LIN HANDLER FLOWCHART
Entered by an Interrupt-On-Change (falling edge)
NO
NO
NO
NO
NO
NO
MESSAGE_COUNTER
= 0?
ID ERROR
RETURN
BREAK ERROR
NO
Break length
< 10 tbits?
RETURN
NO
YES
PARITY ERROR
ID parity bits
RETURN
OK?
NO
YES
MESSAGE_COUNTER
MESSAGE_COUNTER
CHECKSUM ERROR
Checksum and Store
Parity bits and Store
© 2008 Microchip Technology Inc.
Data From Buffer
Transmit Next
Decrement
Checksum
Calculate
RETURN
RETURN
Calculate
= 0 ?
OK?
OK
NO
YES
YES
NO