Specifications

Synapse SM700 Surface-Mount Module
The SM700 surface-mount module is based on the Freescale MC13224 chip. All the details described
for the MC13224 in the previous section apply to the SM700 as well, with these exceptions and
elaborations.
getInfo() return values
A call to built-in function getInfo(0) returns 0 (zero, meaning Synapse) on an SM700 module.
Sleep
The SM700 includes an external 32kHz crystal, so you should use odd-numbered sleep modes for the
most accurate sleep timing. You can still use sleep modes 0 and 2, if you prefer, but there is no power-
consumption advantage, and the timing of your sleep will be adversely affected.
Feature Bits
The SM700 defaults to enforcing FCC TX Power restrictions. You can set the 0x200 bit of NV
Parameter #11 (Feature Bits) to enforce ETSI restrictions instead.
When enforcing FCC restrictions, the SM700 reduces power to minimum on channels 0 and 1, and
disables packet transmission on channel 15 entirely (you can call setChannel(15) on an SM700, but the
end result is a “receive only” node).
When enforcing ETSI restrictions, the SM700 reduces power on all channels to minimum (as if you
had invoked txPower(0) explicitly). This includes channel 15, which remains usable for packet
transmission under ETSI rules.
IO pins
The SM700 supports 46 GPIO input/output pins.
GPIO_0 through GPIO_41 and GPIO_46 through GPIO_49 are accessible.
GPIO_42 through GPIO_45 are not accessible. GPIO_42, GPIO_44, and GPIO_45 are always used
inside the module for Power Amplifier control.
GPIO_50 through GPIO_63 are not accessible.
The table on the following page summarizes the IO mapping on the SM700 module.
Page 184 of 202 SNAP Reference Manual Document Number 600-0007K