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PIC16F819-I/P 用户编程技术手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
8位微控制器
封装:
DIP-18
描述:
PIC16F818/819 8 位微控制器Microchip 的 PIC16F 系列微控制器 8 位 MCU，将 Microchip 的 PIC® 体系架构融入到引脚和封装选件中，从节省空间的 14 引脚设备到功能丰富的 64 引脚设备。 带有基线、中级或增强型中级体系架构的设备提供多种不同的外围设备组合，可谓设计人员提供灵活性，并为应用提供选择。 PIC16F818/819 系列微控制器基于 Microchip 中档内核，带 8 层深硬件堆栈和 35 个指令。 这些 MCU 提供高达 5 MIPS、14 K 字节程序内存和 368 字节 RAM。 板载是一个可配置振荡器，工厂校准到 ±1% 精确度。### 微控制器功能最大 20 MHz CPU 速度 35 个指令 8 级硬件堆栈 8 MHz 内部振荡器 – 可选频率 8 MHz 至 31 kHz 16 个输入/输出引脚 通电重置 (POR) 掉电重置 (BOR) 通电计时器 (PWRT) 振荡器启动计时器 (OST) 监控计时器 (WDT) 在线串行编程 (ICSP) 在线调试 (ICD) ### 外设5 通道 10 位模拟到数字转换器 (ADC) 捕获、比较、PWM (CCP) 模块 两个 8 位计时器 一个 16 位计时器 同步串行端口 (SSP)，带有 SPI 和 I2C展开
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PIC16F819-I/P数据手册
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2004 Microchip Technology Inc. DS39603C-page 3
PIC16F818/819
TABLE 1-1: PIN DESCRIPTIONS (DURING PROGRAMMING): PIC16F818/819
2.0 PROGRAM MODE ENTRY
2.1 User Program Memory Map
The user memory space extends from 0x0000 to
0x1FFF (8K). In Programming mode, the program
memory space extends from 0x0000 to 0x3FFF, with
the first half (0x0000-0x1FFF) being user program
memory and the second half (0x2000-0x3FFF) being
configuration memory. The PC will increment from
0x0000 to 0x07FF, then increment to 0x0800 and
access 0x0000. Once the PC reaches 0x1FFF, it will
increment to 0x2000. From 0x2000, the PC will
increment up to 0x3FFF and wrap around to 0x2000
(not to 0x0000). Once in configuration memory, the
highest bit of the PC remains a ‘1’, always pointing to
the configuration memory. The only way to point to user
program memory is to reset the part and re-enter
Program mode, as described in Section 2.4 “Program
Mode”.
In the configuration memory space, 0x2000-0x201F
are physically implemented. However, only locations
0x2000 through 0x2007 are available. Other locations
are reserved. Locations beyond 0x201F will physically
access user memory (see Figure 2-1).
2.2 Data EEPROM Memory
The EEPROM data memory space is a separate block
of high-endurance memory that the user accesses
using a special sequence of instructions. The amount
of data EEPROM memory depends on the device and
is shown below in number-of-bytes.
The contents of data EEPROM memory have the
capability to be embedded into the HEX file.
The programmer should be able to read data EEPROM
information from a HEX file and, conversely (as an
option), write data EEPROM contents to a HEX file,
along with program memory information and
configuration bit information.
The 256 data memory locations are logically mapped
and use PC<7:0>. The format for data memory storage
is one data byte per address location, LSb aligned.
Pin Name
During Programming
Function Pin Type Pin Description
RB3 PGM I Low-Voltage ICSP Programming input if LVP
configuration bit equals ‘1’
RB6 CLOCK I Clock input
RB7 DATA I/O Data input/output
MCLR
V
PP
P* Program Mode Select
V
DD
V
DD
P Power Supply
V
SS VSS P Ground
Legend: I = Input, O = Output, P = Power
* To activate the Programming mode, high voltage needs to be applied to the MCLR
input. Since MCLR is used
for a level source, this means that MCLR
does not draw any significant current.
Device Program Flash
PIC16F818 1K
PIC16F819 2K
Device # of Bytes
PIC16F818 128
PIC16F819 256
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