DV164122 Microchip Technology, DV164122 Datasheet - Page 79

• Manufacturer Part Number: DV164122
• Description: ANALYZER SRL PICKIT W/DEMO BOARD
• Manufacturer: Microchip Technology
• Series: PICkit™r
• Type: MCUr

Specifications of DV164122

• Contents: PICkit™ Serial Analyzer, 28-pin Demo Board, USB Cable, and Software with Documentation CD
• Processor To Be Evaluated: PIC16F886
• Interface Type: USB
• Silicon Manufacturer: Microchip
• Kit Application Type: Interface
• Application Sub Type: USB
• Silicon Family Name: PIC16F
• Kit Contents: PICkit Serial Analyzer, Demo Board, USB Cable, Software
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: PIC16F886
• For Use With: PKSERIAL-SPI1 - BOARD DEMO PICKIT SERIAL SPIPKSERIAL-I2C1 - BOARD DEMO PICKIT SERIAL I2C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q3260228

9.1
9.2
9.3
© 2007 Microchip Technology Inc.
INTRODUCTION
HIGHLIGHTS
OVERVIEW
Chapter 9. PICkit™ Serial Analyzer Firmware
This chapter explains the internal operations of the PICkit™ Serial Analyzer firmware.
The source code is available on the PICkit Serial Analyzer CD-ROM at D:\PICkit Serial
Analyzer\Firmware.
This chapter discusses:
• EXEC
• COMM
• I
• SPI Communications
• USART Communications
Internally, the PICkit™ Serial Analyzer operates two firmware state controllers running
in parallel – EXEC (executive) and COMM (communication). The EXEC controller is
responsible for overall PICkit™ Serial Analyzer configuration, moving data to/from the
host (via USB) and moving data to/from the COMM controller (via RAM buffers). The
COMM controller supervises serial communication with the target device. This includes
both configuring the necessary communication hardware and executing a sequential
‘script’ defining a serial ‘transaction’.
FIGURE 9-1:
Data streams associated with PICkit™ Serial Analyzer are formatted with markers
called “TAG” bytes. A TAG may be stand-alone or accompanied by data. As seen in
Table 9-1, the data stream for each state controller has a set of associated TAG bytes
defined in detail later in the document.
2
O
H
S
T
CM Communications
EP0-OUT
EP1-OUT
EP0-IN
EP1-IN
USB
ARCHITECTURE
PICkit™ SERIAL ANALYZER
EXEC
ARCHITECTURE
CIRCULAR
(output/data)
CONTROL
BUFFERS
(script/data)
(scratch)
STATUS
CBUF2
CBUF
CBUF1
USER’S GUIDE
CONTROL
USART
COMM
DS51647A-page 73
I
2
SPI
C™
D
E
V
C
E
I