PICAXE-M2

PICAXE-M2 Product Briefing

revolution

picaxem2.pmd

Clock Frequency

Much higher clock rates are now available. This greatly improves the PICAXE processing speed.

The default power-up operating frequency is 4MHz, using the internal resonator. Alternate internal clock

frequencies up to 32MHz are now available – 8x faster than 4MHz!

See: setfreq

More I/O Pins

The serial download pins can now be used as general purpose pins. The new reset command replaces the need for a

separate external reset pin. Therefore on 18 pin parts leg 4 is now available as another general purpose input pin.

See: serrxd, sertxd, disconnect, reconnect, reset

Timeout Support

The M2 parts now support timeouts on the serial, infra red and keyboard commands.

See: serin, serrxd, irin, kbin

Play/Tune Multiple LED Flash

Multiple outputs can now be programmed to flash in time to play and tune ring-tone commands. The piezo for

the tune can be connected to any output pin. All 4 predefined play tunes can be used on any size chip.

See: play, tune

Servo

The servo command operation has been fully updated and revised, and is now more accurate due to additional

‘anti-jitter’ coding. Servo operates at either 4 or 16 MHz.

See: servo, servopos

Infra-red Support

Infra-red input and output can now be used on any pin. Irin input also supports an optional timeout

See: irin, irout (note irin replaces infrain/infrain2)

RF Support

14M2 and 20M2 parts now also support Manchester encode RF radio transmission

See: rfin, rfout

i2c Support

The 08M2, 14M2 and 20M2 parts now also support i2c in addition to the 18M2

See: hi2csetup, hi2cin, hi2cout

More PWM outputs

More PWM output pins are available (up to 4 on the 20M2), see pinout diagrams for more details.

See: pwmout, pwmduty

Longer Nap Delays

The nap command has an extended number of options, giving longer delay options.

See: nap

Internal Input Type / Pullups

Most pins have a weak internal pullup resistor that can be enabled via the ‘pullup’ command. In addition on the

14M2 and 20M2 parts the inputtype can be selected to be be either TTL or ST style on any pin.

See: pullup, inputtype