Datasheet

8
revolution
Revolution Education Ltd. Email: [e-mail] Web: www.rev-ed.co.uk Version 1.0 01/09
AXE091.PMD
AXE091 PICAXE DEVELOPMENT BOARD
Commands - servo, servopos
SPI
The SPI header provides connection to the on-board SPI EEPROM socket, which
may be fitted with a 25LCxx series EEPROM.
Commands - spiout, spiin, hspiout, hspiin
RS232
Two methods of RS232 communication are provided.
The inverted (N) method uses a 10k/22k style circuit to the 3.5mm jack socket. This
allows the normal PICAXE download cable to be used for serial communication via
the input/output pins.
The true (T) method uses a MAX202 circuit connected to the 9 way D serial socket.
This requires a 9 way serial cable e.g. part CAB010.
Commands - serout, serin, hserout, hserin
I2C
The I2C header provides connection to the on-
board I2C EEPROM socket, which may be fitted
with a 24LCxx series EEPROM, and to the
DS1307 RTC socket. The SDA and SCL pins
connect to both device sockets.
The WP pin connects to the EEPROM WP pin,
and is pulled low by a 10k resistor.
The OUT pin connects to the DS1307 OUT pin.
Note that this is an open collector (current sink
only) type of connection.
A 3V lithium backup cell may be optionally
connected to the DS1307 RTC chip. This can be
achieved in either of two ways:
- by soldering a BAT004H-SM socket to
the bottom of the board and
inserting a CR2032 (BAT004) cell
- making a connection to the BAT
header on the top of the board
Commands - hi2cout, hi2cin, readi2c, writei2c
Prototyping board (breadboard):
The breadboard has 60 sets of vertical 5 hole connection sets (30 top sets and 30
bottom sets) for making connections. The vertical sets are not connected across the
centre of the breadboard.
The breadboard also has 4 sets of horizontal 25 hole power rails (2 top sets and 2
bottom sets). The horizontal sets are connected all the way across the top (bottom)
of the breadboard. The four rails are all independant (not connected).
Power connection points (marked V+ and 0V) are provided on the header beside
the ends of the power rails for connecting power to the breadboard rails.
DS1307
5V
0V
X1
X2
Vbat
GND
32.768kHz
watch crystal
4k7
Vcc
OUT
SCL
SDA
24LC16B
A0
A1
A2
GND
Vcc
WP
SCL
SDA
4k7
OUT
SCL
SDA
WP
CLOCK
EEPROM
10k
BAT
MAX 202
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
0.1uF
0.1uF
0.1uF
0.1uF
5V
0V
TX
RX
RXD
TXD
NC
NC
NC
NC
0V
Computer
PIC