Si1000/1/2/3/4/5
Table 3.1. Pin Definitions for the Si1000/1/2/3/4/5 (Continued)
Name
Pin Number
Type
Description
Si1000/1
Si1002/3
Si1004/5
GPIO_0
GPIO_1
GPIO_2
nIRQ
24
24
D I/O or General Purpose I/O controlled by the EZRadioPRO periph-
eral. May be configured through the EZRadioPRO registers
to perform various functions including: Clock Output, FIFO
status, POR, Wake-Up Timer, Low Battery Detect, TRSW,
AntDiversity control, etc. See the EZRadioPRO GPIO Con-
figuration Registers for more information.
A I/O
25
26
11
25
26
11
D I/O or
A I/O
D I/O or
A I/O
D O
EZRadioPRO peripheral interrupt status pin. Will be set low
to indicate a pending EZRadioPRO interrupt event. See the
EZRadioPRO Control Logic Registers for more details. This
pin is an open-drain output with a 220 k internal pullup
resistor. An external pull-up resistor is recommended.
XOUT
XIN
12
13
12
13
A O
A I
EZRadioPRO peripheral crystal oscillator output. Connect
to an external 30 MHz crystal or leave floating if driving the
XIN pin with an external signal source.
EZRadioPRO peripheral crystal oscillator input. Connect to
an external 30 MHz crystal or to an external source. If using
an external clock source with no crystal, dc coupling with a
nominal 0.8 VDC level is recommended with a minimum
ac amplitude of 700 mVpp.
NC
14, 20, 14, 20,
No Connect. May be left floating or tied to power or ground.
22
22
SDN
15
15
D I
EZRadioPRO peripheral shutdown pin. When driven to
logic HIGH, the EZRadioPRO peripheral will be completely
shut down and the contents of the EZRadioPRO registers
will be lost. This pin should be driven to logic LOW during all
other times; this pin should never be left floating.
TX
17
17
A O
EZRadioPRO peripheral transmit RF output pin. The PA
output is an open-drain connection so the L-C match must
supply (1.8 to 3.6 VDC) to this pin.
RXp
RXn
18
19
18
19
A I
A I
EZRadioPRO peripheral differential RF input pins of the
LNA. See application schematic for example matching net-
work.
ANT_A
21
21
D O
EZRadioPRO peripheral TR switch control signal.
Rev. 1.0
31
SILICON [ SILICON ]
