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| 型號： | PIC18F86J93-I/PT |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 29/54頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PIC MCU FLASH 64KX4 80-TQFP |
| 產(chǎn)品培訓(xùn)模塊： | PIC18 J Series MCU Overview 8-bit PIC® Microcontroller Portfolio |
| 標(biāo)準(zhǔn)包裝： | 119 |
| 系列： | PIC® 18F |
| 核心處理器： | PIC |
| 芯體尺寸： | 8-位 |
| 速度： | 48MHz |
| 連通性： | I²C，LIN，SPI，UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，LCD，LVD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 67 |
| 程序存儲器容量： | 64KB（32K x 16） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 3923 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 12x12b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 80-TQFP |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 644 (CN2011-ZH PDF) |
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2009 Microchip Technology Inc.
Preliminary
DS39948A-page 33
PIC18F87J93 FAMILY
2.2
Selecting and Configuring
Automatic Acquisition Time
The ADCON2 register allows the user to select an
acquisition time that occurs each time the GO/DONE
bit is set.
When the GO/DONE bit is set, sampling is stopped and
a conversion begins. The user is responsible for ensur-
ing the required acquisition time has passed between
selecting the desired input channel and setting the
GO/DONE bit. This occurs when the ACQT<2:0> bits
(ADCON2<5:3>) remain in their Reset state (‘000’) and
is
compatible
with
devices
that
do
not
offer
programmable acquisition times.
If desired, the ACQT bits can be set to select a
programmable acquisition time for the A/D module.
When the GO/DONE bit is set, the A/D module continues
to sample the input for the selected acquisition time, then
automatically begins a conversion. Since the acquisition
time is programmed, there may be no need to wait for an
acquisition time between selecting a channel and setting
the GO/DONE bit.
In either case, when the conversion is completed, the
GO/DONE bit is cleared, the ADIF flag is set and the
A/D begins sampling the currently selected channel
again. If an acquisition time is programmed, there is
nothing to indicate if the acquisition time has ended or
if the conversion has begun.
2.3
Selecting the A/D Conversion
Clock
The A/D conversion time per bit is defined as TAD. The
A/D conversion requires 11 TAD per 12-bit conversion.
The source of the A/D conversion clock is software
selectable.
There are seven possible options for TAD:
2 TOSC
4 TOSC
8 TOSC
16 TOSC
32 TOSC
64 TOSC
Internal RC Oscillator
For correct A/D conversions, the A/D conversion clock
(TAD) must be as short as possible but greater than the
minimum TAD.
the device operating frequencies and the A/D clock
source selected.
TABLE 2-1:
TAD vs. DEVICE OPERATING
FREQUENCIES
2.4
Configuring Analog Port Pins
The ADCON1, TRISA, TRISF and TRISH registers
control the operation of the A/D port pins. The port pins
needed as analog inputs must have their correspond-
ing TRIS bits set (input). If the TRIS bit is cleared
(output), the digital output level (VOH or VOL) will be
converted.
The A/D operation is independent of the state of the
CHS<3:0> bits and the TRIS bits.
AD Clock Source (TAD)Maximum
Device
Frequency
Operation
ADCS<2:0>
2 TOSC
000
2.86 MHz
4 TOSC
100
5.71 MHz
8 TOSC
001
11.43 MHz
16 TOSC
101
22.86 MHz
32 TOSC
010
40.0 MHz
64 TOSC
110
40.0 MHz
RC(2)
x11
1.00 MHz(1)
Note 1: The RC source has a typical TAD time of
4
μs.
2: For device frequencies above 1 MHz, the
device must be in Sleep mode for the entire
conversion or the A/D accuracy may be out
of specification.
Note 1: When reading the PORT register, all pins
configured as analog input channels will
read as cleared (a low level). Pins config-
ured as digital inputs will convert an
analog input. Analog levels on a digitally
configured
input
will
be
accurately
converted.
2: Analog levels on any pin defined as a
digital input may cause the digital input
buffer to consume current out of the
device’s specification limits.
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| PIC18F86J93T-I/PT | 功能描述:8位微控制器 -MCU 80pin,4KB RAM,12MIPS SEG LCD, 64KB Flash RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
| PIC18F86J94-I/PT | 制造商:Microchip Technology Inc 功能描述:80 PINS, 64KB FLASH, 4KB RAM, 16MIPS, NANOWATT XLP, LCD, USB - Trays 制造商:Microchip Technology Inc 功能描述:IC MCU 8BIT 64KB FLASH 80TQFP |
| PIC18F86J94T-I/PT | 制造商:Microchip Technology Inc 功能描述:80 PINS, 64KB FLASH, 4KB RAM, 16MIPS, NANOWATT XLP, LCD, USB - Tape and Reel 制造商:Microchip Technology Inc 功能描述:IC MCU 8BIT 64KB FLASH 80TQFP 制造商:Microchip Technology Inc 功能描述:8-bit Microcontrollers - MCU 80 pins, 64KB Flash, 4KB RAM, 16MIPS |
| PIC18F86K22-E/PT | 功能描述:8位微控制器 -MCU 64KB Flash 4KB RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
| PIC18F86K22-I/PT | 功能描述:8位微控制器 -MCU 64kB Flash 4kB RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT |
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