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PIC18F46K40-E/PT 用户编程技术手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
TQFP-44
描述:
8位微控制器 -MCU 64KB Flash, 4KB RAM, 256B EEPROM, 10-bit ADC2, 5-bit DAC, Comp, PWM, CCP, CWG, HLT, WWDT, SCAN/CRC, ZCD, PPS, EUSART, SPI/I2C, IDLE/DOZE/PMD
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PIC18F46K40-E/PT数据手册
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PIC18(L)F2X/4XK40
DS40001772B-page 2 2014-2015 Microchip Technology Inc.
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 programming voltage, but can instead be left at the normal operating
voltage.
1.3.2.1 Single-Supply ICSP Programming
The device’s LVP Configuration bit enables single-supply (low-voltage) ICSP programming. The LVP bit defaults to a ‘1’
(enabled). 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 1-2. For pin locations and packaging
information, please refer to Table B-3.
Note 1: The High-Voltage ICSP mode is always available, regardless of the state of the LVP bit, by applying V
IHH
to the MCLR/VPP pin.
2: While in Low-Voltage ICSP mode, MCLR
is always enabled, regardless of the MCLRE bit. Also, the port
pin can no longer be used as a general purpose input.
TABLE 1-2: 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 I
(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 the MCLR
input. Since the MCLR is used for a level source, MCLR does not draw
any significant current.
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