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Pin Description
PRELIMINARY V1.8
3
4.
Pin Description
Port
Pin #
Pin Name
I/O Type
Functions
VDD
1
Vdd
Digital Supply Voltage
NRESET
2
NRESET
Reset
TST
3
TST
Test pin
BXFOUT
4
BXFOUT
Buffered High Frequency Output
XFOUT
5
XFOUT
Oscillator
High frequency crystal output
XFIN
6
XFIN
Oscillator
High frequency crystal input
XSOUT
7
XSOUT
Oscillator
Slow frequency crystal output
XSIN
8
XSIN
Oscillator
Slow frequency crystal input
P4.0
9
RFPWR
I/O 3
RF power switch output/ I/O
P4.1
10
PLLSW
I/O 3
Phase-lock loop switch output/ I/O
P4.2
11
LOCK
I/O 3
Lock Indicator
P4.3
12
I/O
I/O 3
Latched bi-directional I/O
P4.4
13
I/O
I/O 3
Latched bi-directional I/O
P4.5
14
I/O
I/O 3
Latched bi-directional I/O
P4.6
15
I/O
I/O 3
Latched bi-directional I/O
P4.7
16
I/O
I/O 3
Latched bi-directional I/O
P3.0
17
CPTRU2
I/O 3
Capture Timer 2
P3.1
18
CPTRU1
I/O 3
Capture Timer 1
VSS
19
Vss
Digital Ground
P3.2
20
CPTRD1
I/O 3
Capture Timer 1/Down Counter
P3.3
21
TXEN
I/O 3
Transmitter enable output/ I/O
P3.4
22
MODOUT
I/O 3
Modulated output (chips output)
P3.5
23
DI
I/O 2
Digital (DI) / Analog (DI1) Data
Input
P3.6
24
IRQ1
I/O 3
External Interrupt 0
P3.7
25
IRQ2
I/O 3
External Interrupt 1
DIREF
26
DIREF
I/O 3
Analog Data Input Comparator
External reference voltage
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