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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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PIC18F23K20 Arkusz danych(PDF) 1 Page - Microchip Technology |
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PIC18F23K20 Arkusz danych(HTML) 1 Page - Microchip Technology |
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1 / 42 page  © 2009 Microchip Technology Inc. Advance Information DS41297F-page 1 PIC18F2XK20/4XK20 1.0 DEVICE OVERVIEW This document includes the programming specifications for the following devices: • PIC18F23K20 • PIC18F24K20 • PIC18F25K20 • PIC18F26K20 • PIC18F43K20 • PIC18F44K20 • PIC18F45K20 • PIC18F46K20 2.0 PROGRAMMING OVERVIEW The PIC18F2XK20/4XK20 devices can be pro- grammed using either the high-voltage In-Circuit Serial Programming™ (ICSP™) method or the low-voltage ICSP method. Both methods can be done with the device in the users’ system. The low-voltage ICSP method is slightly different than the high-voltage method and these differences are noted where applica- ble. This programming specification applies to the PIC18F2XK20/4XK20 devices in all package types. 2.1 Hardware Requirements In High-Voltage ICSP mode, the PIC18F2XK20/4XK20 devices require two programmable power supplies: one for VDD and one for MCLR/VPP/RE3. Both supplies should have a minimum resolution of 0.25V. Refer to Section 6.0 “AC/DC Characteristics Timing Requirements for Program/Verify Test Mode” for additional hardware parameters. 2.1.1 LOW-VOLTAGE ICSP PROGRAMMING In Low-Voltage ICSP mode, the PIC18F2XK20/4XK20 devices can be programmed using a single VDD source in the operating range. The MCLR/VPP/RE3 does not have to be brought to a different voltage, but can instead be left at the normal operating voltage. Refer to Section 6.0 “AC/DC Characteristics Timing Requirements for Program/Verify Test Mode” for additional hardware parameters. 2.2 Pin Diagrams The pin diagrams for the PIC18F2XK20/4XK20 family are shown in Figure 2-3 and Figure 2-4. TABLE 2-1: PIN DESCRIPTIONS (DURING PROGRAMMING): PIC18F2XK20/4XK20 Pin Name During Programming Pin Name Pin Type Pin Description MCLR/VPP/RE3 VPP P Programming Enable VDD(2) VDD P Power Supply VSS(2) VSS PGround RB5 PGM I Low-Voltage ICSP™ input when LVP Configuration bit equals ‘1’(1) RB6 PGC I Serial Clock RB7 PGD I/O Serial Data Legend: I = Input, O = Output, P = Power Note 1: See Figure 5-1 for more information. 2: All power supply (VDD) and ground (VSS) pins must be connected. Flash Memory Programming Specification |
Podobny numer części - PIC18F23K20 |
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