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參數(shù)資料
| 型號(hào)： | PIC12C509AT-04I/MF |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 43/113頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU OTP 1KX12 8-DFN |
| 標(biāo)準(zhǔn)包裝： | 3,300 |
| 系列： | PIC® 12C |
| 核心處理器： | PIC |
| 芯體尺寸： | 8-位 |
| 速度： | 4MHz |
| 外圍設(shè)備： | POR，WDT |
| 輸入/輸出數(shù)： | 5 |
| 程序存儲(chǔ)器容量： | 1.5KB（1K x 12） |
| 程序存儲(chǔ)器類型： | OTP |
| RAM 容量： | 41 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 8-VDFN 裸露焊盤 |
| 包裝： | 帶卷 (TR) |
| 配用： | AC164324-ND - MODULE SKT FOR MPLAB 8DFN/16QFN XLT08DFN2-ND - SOCKET TRANSITION ICE 14DIP/8DFN XLT08DFN-ND - SOCKET TRANSITION ICE 8DFN AC164032-ND - ADAPTER PICSTART PLUS 8DFN/DIP AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC |
| 其它名稱： | PIC12C509AT04I/MF |
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1999 Microchip Technology Inc.
DS40139E-page 35
PIC12C5XX
8.0
SPECIAL FEATURES OF THE
CPU
What
sets
a
microcontroller
apart
from
other
processors are special circuits to deal with the needs
of real-time applications. The PIC12C5XX family of
microcontrollers has a host of such features intended
to maximize system reliability, minimize cost through
elimination of external components, provide power
saving operating modes and offer code protection.
These features are:
Oscillator selection
Reset
- Power-On Reset (POR)
-Device Reset Timer (DRT)
- Wake-up from SLEEP on pin change
Watchdog Timer (WDT)
SLEEP
Code protection
ID locations
In-circuit Serial Programming
The PIC12C5XX has a Watchdog Timer which can be
shut off only through configuration bit WDTE. It runs
off of its own RC oscillator for added reliability. If using
XT or LP selectable oscillator options, there is always
an 18 ms (nominal) delay provided by the Device
Reset Timer (DRT), intended to keep the chip in reset
until the crystal oscillator is stable. If using INTRC or
EXTRC there is an 18 ms delay only on VDD power-up.
With this timer on-chip, most applications need no
external reset circuitry.
The SLEEP mode is designed to offer a very low
current power-down mode. The user can wake-up
from SLEEP through a change on input pins or
through a Watchdog Timer time-out. Several oscillator
options are also made available to allow the part to fit
the application, including an internal 4 MHz oscillator.
The EXTRC oscillator option saves system cost while
the
LP
crystal
option
saves
power.
A
set
of
configuration bits are used to select various options.
8.1
Configuration Bits
The PIC12C5XX configuration word consists of 12
bits. Configuration bits can be programmed to select
various device configurations. Two bits are for the
selection of the oscillator type, one bit is the Watchdog
Timer enable bit, and one bit is the MCLR enable bit.
FIGURE 8-1:
CONFIGURATION WORD FOR PIC12C5XX
—
MCLRE
CP
WDTE FOSC1 FOSC0
Register:
CONFIG
Address(1):FFFh
bit11
10
987
654
321
bit0
bit 11-5: Unimplemented
bit 4:
MCLRE: MCLR enable bit.
1 = MCLR pin enabled
0 = MCLR tied to VDD, (Internally)
bit 3:
CP: Code protection bit.
1 = Code protection off
0 = Code protection on
bit 2:
WDTE: Watchdog timer enable bit
1 = WDT enabled
0 = WDT disabled
bit 1-0:
FOSC1:FOSC0: Oscillator selection bits
11 = EXTRC - external RC oscillator
10 = INTRC - internal RC oscillator
01 = XT oscillator
00 = LP oscillator
Note 1:
Refer to the PIC12C5XX Programming Specifications to determine how to access the
configuration word. This register is not user addressable during device operation.
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