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PIC16(L)F18323 Datasheet(PDF) 2 Page - Microchip Technology |
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PIC16(L)F18323 Datasheet(HTML) 2 Page - Microchip Technology |
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2 / 44 page F18323/992/2/PIC16(L)F18323.png) PIC16(L)F183XX DS40001738D-page 2 2014-2016 Microchip Technology Inc. 1.2.3 MULTI-WORD PROGRAMMING INTERFACE Program Flash memory panels include up to a 32-word (one row) programming interface. The row to be programmed must first be erased either with a Bulk Erase or a Row Erase. 1.3 Hardware Requirements 1.3.1 HIGH-VOLTAGE ICSP PROGRAMMING In High-Voltage ICSP mode, the device requires two programmable power supplies: one for VDD and one for the MCLR/ VPP pin. 1.3.2 LOW-VOLTAGE ICSP PROGRAMMING In Low-Voltage ICSP mode, the device can be programmed using a single VDD source in the operating range. The MCLR/VPP pin does not have to be brought to a different voltage, but can instead be left at the normal operating voltage. 1.3.2.1 Single-Supply ICSP Programming The LVP bit enables single-supply (low-voltage) ICSP programming. The LVP bit defaults to a ‘1’ (enabled) from the factory. The LVP bit may only be programmed to ‘0’ by entering the High-Voltage ICSP mode, where the MCLR/VPP pin is raised to VIHH. Once the LVP bit is programmed to a ‘0’, only the High-Voltage ICSP mode is available and only the High-Voltage ICSP mode can be used to program the device. 1.4 Pin Utilization Five pins are needed for ICSP programming. The pins are listed in Table 1-3. For pin locations and packaging information please refer to Table B-2 through Table E-2. Note 1: The High-Voltage ICSP mode is always available, regardless of the state of the LVP bit, by applying VIHH to the MCLR/VPP pin. 2: While in Low-Voltage ICSP mode, MCLR is always enabled, regardless of the MCLRE bit, and the port pin can no longer be used as a general purpose input. TABLE 1-3: PIN DESCRIPTIONS DURING PROGRAMMING Pin Name During Programming Function Pin Type Pin Description ICSPCLK ICSPCLK I Clock Input – Schmitt Trigger Input ICSPDAT ICSPDAT I/O Data Input/Output – Schmitt Trigger Input MCLR/VPP Program/Verify mode P(1) Program Mode Select VDD VDD P Power Supply VSS VSS P Ground Legend: I = Input, O = Output, P = Power Note 1: The programming high voltage is internally generated. To activate the Program/Verify mode, high voltage needs to be applied to MCLR input. Since the MCLR is used for a level source, MCLR does not draw any significant current. |
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