PIC-MINI-WEB development board
Users Manual
Rev. C, July 2006
Copyright(c) 2010, OLIMEX Ltd, All rights reserved
Page 1
INTRODUCTION:
PIC-MINI-WEB is with dimensions only 55 x 36 mm but don't let this fool
you. This board is very powerful and will allow you to connect almost
everything to Internet.
The board has PIC18F25J10 microcontroller with 32KB of program Flash
memory, 1024 RAM memory and allows Microchip free TCP-IP stack to be
programmed. In addition on-board flash of 1 Mbit (128KB) is available as
data storage for web pages and other data. The LAN connector could be
connected to 10 Mbit Ethernet switch or hub.
There is also IDC14 connector with 10 GPIOs available for future extension
and power supply and reset signals.
What CAN YOU do with this board? You name it: you can setup web server
with dynamic web pages which allows you to read PIC resources or to drive
them through web interface, i.e. to read ADC and display it on the web or
to toggle GPIO outputs from the web, very conveninet way to make home
automation for instance and to monitor and control your home from
anywhere with Internet. Another service this board can run is FTP server,
either you can control the PIC by Telnet, or you can send and receive e-
mails and trigger hardware events with them. All this is possible due to the
free firmware which Microchip provides, and the best of all - it has neither
upfront charges for software nor royalies.
BOARD FEATURES:
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PIC18F25J10 microcontroller, ENC28J60 Ethernet
controller, 32KB Flash, 1KB RAM
1Mbit on board serial flash for web pages storage
ICSP/ICD connector for programming and debugging
with PIC-ICD2, PIC-ICD2-POCKET and PIC-ICD2-TINY.
Reset button
User event button connected to RB0 interrupt
Complete web server and TCP-IP stack support as per
Microchip's open source TCP-IP stack
Power plug-in jack for +5VDC power supply
Voltage regulator +3.3V and filtering capacitors
Status LED
Extension header to connect to other boards, 10 GPIOs
and power supply, reset signals
Dimensions 55x36 mm (2.16x1.42")
ELECTROSTATIC WARNING:
The PIC-MINI-WEB board is shipped in protective anti-static packaging. The
board must not be subject to high electrostatic potentials. General practice
for working with static sensitive devices should be applied when working
with this board.
Page 2
BOARD USE REQUIREMENTS:
Cables:
Depends on the used programming/debugging tool. It could be
1.8 meter USB A-B cable to connect PIC-ICD2 or PIC-ICD2-
POCKET to USB host on PC and RS232 cable, if you use PIC-
ICD2-TINY. You will also need a LAN cable.
Programmer/Debugger – some of Olimex programmers are
applicable, for example
PIC-ICD2, PIC-ICD2-POCKET, PIC-
ICD2-TINY
or other compatible programming/debugging tool.
Hardware:
!!!Warning!!!
When you want to program this microcontroller with PIC-
ICD2, PIC-ICD2-POCKET or PIC-ICD2-TINY, before connecting
the programmer to your target board, you should first connect
the programmer to your computer and open MPLAB. There,
first from menu Configure – Select Device – choose the
microcontroller you are about to program, then from menu
Programmer – Select Programmer – choose MPLAB ICD 2, wait
while MPLAB is downloading operation system, and after ICD2
is connected – check in menu Programmer – Settings – Power –
there is option – Power target circuit from MPLAB ICD 2 – this
option should be forbidden, you could not select it. Now it is
safe to connect the programmer to your target board.
Software:
PIC-MINI-WEB is tested with
MPLAB IDE v.7.62 + MPLAB
C18
C compiler. It is possible that the stack might not
function properly if used with later versions of MPLAB IDE.
PROCESSOR FEATURES:
PIC-MINI-WEB
board uses MCU
PIC18F25J10
from Microchip with these
features:
- Operating voltage range: 2.0V to 3.6V
- 5.5V tolerant input (digital pins only)
- On-chip 2.5V regulator
- Low-power, high-speed CMOS Flash technology
- C compiler optimized architecture:
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Optional extended instruction set designed to optimize re-
entrant code
- Priority levels for interrupts
- 8 x 8 Single-Cycle Hardware Multiplier
- Extended Watchdog Timer (WDT)
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Programmable period from 4 ms to 131s
- Single-Supply In-Circuit Serial Programming™ (ICSP™) via two pins
- In-Circuit Debug (ICD) with three Break points via two pins
- Power-Managed modes:
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Run: CPU on, peripherals on
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Idle: CPU off, peripherals on
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Sleep: CPU off, peripherals off
- Two Crystal modes, up to 40 MHz
- Two External Clock modes, up to 40 MHz
- Internal 31 kHz oscillator
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Secondary oscillator using Timer1 @ 32 kHz
Two-Speed Oscillator Start-up
Fail-Safe Clock Monitor:
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Allows for safe shutdown if peripheral clock stops
High-current sink/source 25 mA/25 mA (PORTB and PORTC)
Three programmable external interrupts
Four input change interrupts
One Capture/Compare/PWM (CCP) module
One Enhanced Capture/Compare/PWM (ECCP) module:
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One, two or four PWM outputs
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Selectable polarity
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Programmable dead time
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Auto-Shutdown and Auto-Restart
Two Master Synchronous Serial Port (MSSP) modules supporting 3-wire
SPI™ (all 4 modes) and I2C™ Master and Slave modes
One Enhanced Addressable USART module:
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Supports RS-485, RS-232 and LIN 1.2
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Auto-Wake-up on Start bit
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Auto-Baud Detect
10-bit, up to 13-channel Analog-to-Digital Convertor module (A/D):
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Auto-acquisition capability
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Conversion available during Sleep
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Self-calibration feature
Dual analog comparators with input multiplexing
Page 4
BLOCK DIAGRAM:
Page 5
微控制器 MCU
