參數資料
型號： PIC16F676-I/ML
廠商： Microchip Technology
文件頁數： 87/132頁
文件大小： 0K
描述： IC PIC MCU FLASH 1KX14 16QFN
產品培訓模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝： 91
系列： PIC® 16F
核心處理器： PIC
芯體尺寸： 8-位
速度： 20MHz
外圍設備： 欠壓檢測/復位，POR，WDT
輸入/輸出數： 12
程序存儲器容量： 1.75KB（1K x 14）
程序存儲器類型： 閃存
EEPROM 大小： 128 x 8
RAM 容量： 64 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
數據轉換器： A/D 8x10b
振蕩器型： 內部
工作溫度： -40°C ~ 85°C
封裝/外殼： 16-VQFN 裸露焊盤
包裝： 管件
產品目錄頁面： 638 (CN2011-ZH PDF)
配用： AC164324-ND - MODULE SKT FOR MPLAB 8DFN/16QFN
PIC16F630/676
DS40039F-page 58
2010 Microchip Technology Inc.
9.2.3
EXTERNAL CLOCK IN
For applications where a clock is already available
elsewhere, users may directly drive the PIC16F630/
676 provided that this external clock source meets the
AC/DC timing requirements listed in Section 12.0
an external clock circuit should be configured.
9.2.4
RC OSCILLATOR
For applications where precise timing is not a
requirement, the RC oscillator option is available. The
operation and functionality of the RC oscillator is
dependent upon a number of variables. The RC
oscillator frequency is a function of:
Supply voltage
Resistor (REXT) and capacitor (CEXT) values
Operating temperature
The oscillator frequency will vary from unit to unit due
to normal process parameter variation. The difference
in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low
CEXT values. The user also needs to account for the
tolerance of the external R and C components.
Figure 9-3 shows how the R/C combination is
connected.
Two options are available for this Oscillator mode
which allow RA4 to be used as a general purpose I/O
or to output FOSC/4.
FIGURE 9-3:
RC OSCILLATOR MODE
9.2.5
INTERNAL 4 MHZ OSCILLATOR
When calibrated, the internal oscillator provides a fixed
4 MHz (nominal) system clock. See Electrical
tions”, for information on variation over voltage and
temperature.
Two options are available for this Oscillator mode
which allow RA4 to be used as a general purpose I/O
or to output FOSC/4.
9.2.5.1
Calibrating the Internal Oscillator
A calibration instruction is programmed into the last
location of program memory. This instruction is a
RETLW XX
, where the literal is the calibration value.
The literal is placed in the OSCCAL register to set the
calibration of the internal oscillator. Example 9-1
demonstrates how to calibrate the internal oscillator.
For best operation, decouple (with capacitance) VDD
and VSS as close to the device as possible.
EXAMPLE 9-1:
CALIBRATING THE
INTERNAL OSCILLATOR
9.2.6
CLKOUT
The PIC16F630/676 devices can be configured to
provide a clock out signal in the INTOSC and RC
Oscillator modes. When configured, the oscillator
frequency divided by four (FOSC/4) is output on the
RA4/OSC2/CLKOUT pin. FOSC/4 can be used for test
purposes or to synchronize other logic.
RA4/OSC2/CLKOUT
CEXT
VDD
REXT
VSS
PIC16F630/676
RA5/OSC1/
FOSC/4
Internal
Clock
CLKIN
Note:
Erasing the device will also erase the pre-
programmed internal calibration value for
the internal oscillator. The calibration value
must be saved prior to erasing part as
specified in the PIC16F630/676 Program-
ming specification. Microchip Develop-
ment Tools maintain all calibration bits to
factory settings.
BSF
STATUS, RP0
;Bank 1
CALL
3FFh
;Get the cal value
MOVWF
OSCCAL
;Calibrate
BCF
STATUS, RP0
;Bank 0
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相關代理商/技術參數
參數描述
PIC16F676T-E/SL 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 12 I/O Ext Temp SOIC14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F676T-E/ST 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 12 I/O Ext Temp TSSOP14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F676T-I/ML 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 12I/O Ind Temp QFN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F676T-I/SL 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 12 I/O Ind Temp SOIC14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F676T-I/ST 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 12 I/O Ind Temp TSSOP14 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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