Data Sheet

4
SNAP Engine RF220 Series Data Sheet — 116-111507-012-E000
RF220SU
Pin
Pin Name
SNAPpy
IO
ATmega128RFA1 Pin
Name
Pin Description
16 GPIO14 18 PE2_XCK0_AIN0
IO or software SPI1 MISO or Analog
Comparator or External Clock
17 GPIO15 28 PF4_ADC4_TCK IO or Analog4 or JTAG Test Clock
18 GPIO16 29 PF5_ADC5_TMS
IO or Analog5 or JTAG Test Mode
Select
19 GPIO17 30 PF6_ADC6_TDO
IO or Analog6 or JTAG Test Data Out
or software I
2
C SDA
20 GPIO18 31 PF7_ADC7_TDI
IO or Analog7 or JTAG Test Data In
or software I
2
C SCL
21 VCC VCC Power Supply
22 GPIO19 19 PE3_OC3A_AIN1
IO or Analog Comparator or PWM or
Output Compare Match
23 RESET# RESET# Module Reset, Active Low
24 GND GND Power Supply
Electrical Characteristics
Unless otherwise specified in this document, all electrical characteristics conform to the Atmel ATmega 128RFA1
microcontroller. Detailed specifications on all electrical characteristics are available on the Atmel website at
http://www.atmel.com/
Symbol Parameter Condition Min Typ Max Units
V
CC
1
Supply Voltage 2.0 3.3 3.6 V
Table 1.3: RF220SU DC Characteristics at 25° C
Symbol Parameter Condition Min Typical Max Unit
V
REFH
2
ADC Voltage Reference, High Programmable 1.5 1.6 1.8 V
V
INDC
Analog input voltage
Single Ended 0 1.8
V
Table 1.4: ADC Electrical Characteristics (Operating)
1
Absolute maximum stress rated voltage for VCC is -0.3 to 3.6. It is recommended that bulk capacitance be located as close as possible to the
VCC pin on the host board. Ideally, use a single 47µF capacitor rated at 10V directly at the VCC pin.
2
VREFH is programmable to three fixed values; 1.5V, 1.6V, and 1.8V. The VREFH value will be 1.6 volts if you do not explicitly adjust it by
poking the ATmega128RFA1 registers.