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MCP19124 Datasheet(PDF) 211 Page - Microchip Technology |
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MCP19124 Datasheet(HTML) 211 Page - Microchip Technology |
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211 / 236 page  2016 Microchip Technology Inc. DS20005619A-page 211 MCP19124/5 30.0 IN-CIRCUIT SERIAL PROGRAMMING™ (ICSP™) ICSP allows customers to manufacture circuit boards with unprogrammed devices. Programming can be done after the assembly process, allowing the device to be programmed with the most recent firmware or a custom firmware. Five pins are needed for ICSP programming: •ICSPCLK •ICSPDAT •MCLR •VDD •AGND In Program/Verify mode, the Program Memory, User IDs and the Configuration Words are programmed through serial communications. The ICSPDAT pin is a bidirectional I/O used for transferring the serial data and the ICSPCLK pin is the clock input. The device is placed into a Program/Verify mode by holding the ICSPDAT and ICSPCLK pins low, while raising the MCLR pin from VIL to VIHH. 30.1 Common Programming Interfaces Connection to a target device is typically done through an ICSP header. A commonly found connector on development tools is the RJ-11 in the 6P6C (6-pin, 6- connector) configuration. Refer to Figure 30-1. FIGURE 30-1: ICD RJ-11 STYLE CONNECTOR INTERFACE Another connector often found in use with the PICkit™ programmers is a standard 6-pin header with 0.1 inch spacing. Refer to Figure 30-2. FIGURE 30-2: PICkit™ STYLE CONNECTOR INTERFACE 1 2 3 4 5 6 MCLR AGND ICSPCLK VDD ICSPDAT NC Pin Description* 1 = MCLR 2 = VDD Target 3 = VSS (Ground) 4 = ICSPDAT 5 = ICSPCLK 6 = No Connect Target PC Board Bottom Side The 6-pin header (0.100" spacing) accepts 0.025" square pins. 1 2 3 4 5 6 Pin Description* 1 = MCLR 2 = VDD Target 3 = AGND 4 = ICSPDAT 5 = ICSPCLK 6 = No Connect Pin 1 Indicator * The 6-pin header (0.100" spacing) accepts 0.025" square pins. |
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