DV164122 Microchip Technology, DV164122 Datasheet - Page 47

• 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

© 2007 Microchip Technology Inc.
FIGURE 5-4:
5.6.1
Figures 5-5 through 5-7 demonstrates how to communicate with a 25LC020A SPI
serial EEPROM. Refer to the 25LC020A Data Sheet (DS21833) for a detailed
explanation of its SPI communications.
Before data can be written to the 25LC020A, the write enable (WREN) latch must be
set. This requires that CS be enabled, command 0x06 transmitted, and CS disabled.
Figure 5-5 shows only Group 0 enabled. All other groups are disabled. Clicking on the
Execute button will transmit only the WREN command. The command will be logged
in the Transactions window.
FIGURE 5-5:
Once the WREN latch has been enabled, data can be written to the 25LC020A.
Figure 5-6 shows that Group 0 has been disabled, and Group 1 enabled. Clicking on
the Execute button will send the Write command (0x02), the memory address (0x00),
followed by three bytes of data: 0xAA, 0xBB, and 0xCC. The command will be logged
in the Transactions window.
Basic Communications – Serial EEPROM Example
SPI BASIC OPERATIONS
SEEPROM EXAMPLE – WREN COMMAND
SPI Master Communications
DS51647A-page 41