User's Manual

A85xxE24A91 – Users Manual Page 21 of 28
Release Date: Dec 1
st
2010
Table 2 pin-out table, with references to chip pins
Pin Number
Pin Name Pin Type Description
CC259x Pin CC85xx Pin
1 GND Common
2
DNC (RF-
Test)
Connecting this pin to anything will significantly affect the performance of the module and
may
void
the end users right, under FCC, to operate the module
3 GND Common
4 AVdd_CC259x
Power/Decoup
ling
This pin should not be used unless deemed necessary in particular noisy power supply
environments, See "power supply consideration" section for more information
5 VBAT Analog Input
Battery voltage supervisor (threshold level programmable by external resistor to positive
battery terminal)
29
6 SCL, GIO10 Digital I/O
I2C master clock line. Must be connected to external pull-up, General-purpose digital I/O
pin 10
32
7 SDA, GIO11 Digital I/O Digital I/O1 I2C master data line. Must be connected to external pull-up, General-purpose 33
8 GIO12 Digital I/O General-purpose digital I/O pin 12 34
9 GIO13 Digital I/O General-purpose digital I/O pin 13 35
10 XPAEN/PAEN Digital Out
The CC85xx asserts this pin high to turn on the CC259x power amplifier for transmit. The
pin can be used to detect the radio state to synchronize other system events e.g. to
smooth out power consumption or minimize noise injection. A high indicates that the PA
is on. At no time will both XPAEN and XLNAEN be high at the same time.
536
11 XLNAEN/EN Digital Out
The CC85xx asserts this pin high to turn on the CC259x low noise amplifier. The pin can
be used to detect the radio state to synchronize other system events e.g. to turn of
noise/switching sources for better sensitivity. At no time will both XPAEN and XLNAEN
be high at the same time.
638
12 GND Common
13 XANTN Digital I/O Do Not Connect (future antenna diversity control or USB interface) 1
14 XANTP Digital I/O Do Not Connect (future antenna diversity control or USB interface) 2
15 CS_N
Digital Input
(Pull-up)
Serial SPI configuration interface, active low chip select 3
16 SCLK Digital I/O Serial SPI configuration interface, clock input/output 4
17 MOSI Digital I/O Serial SPI configuration interface, master data input, slave data output 5
18 MISO, GIO0 Digital I/O
Serial SPI configuration interface, master data output, slave data input GIO0 output when
CS_N is deasserted. General-purpose digital I/O pin 0
6
19 GIO1 Digital I/O General-purpose digital I/O pin 1, Configurable with PurePath™ Wireless Configurator 7
20 GIO2 Digital I/O General-purpose digital I/O pin 2 8
21 GIO3 Digital I/O General-purpose digital I/O pin 3, Configurable with PurePath™ Wireless Configurator 9
22 GND Common
23 RSTN
Digital Input
(Pull-up)
Active-low device reset 11
24 MCLK Digital I/O Digital I/O1 Master clock output for external audio devices (GIO4). 13
25 BCLK Digital I/O Digital I/O1 I2S/DSP audio interface bit clock (in/out) (GIO5). 14
26 WCLK Digital I/O Digital I/O1 I2S/DSP audio interface word clock (in/out) (GIO6). 15
27 AD0 Digital I/O Digital I/O1 I2S/DSP audio interface data line 0 (in/out) (GIO7). 16
28 AD1 Digital I/O Digital I/O1 I2S/DSP audio interface data line 1 (in/out) (GIO8). 17
29 AD2, GIO9 Digital I/O
Digital I/O2 I2S/DSP audio interface data line 2 (in/out), Configurable with PurePath™
Wireless Configurator
19
30 GND Common
31 HGM Digital Input
Digital control pin. HGM=1 ? CC259x LNA is in High Gain Mode (~10dB gain),
HGM=0 ? CC259x LNA is in Low Gain Mode (~0dB gain). Can be used to avoid
overdriving the receiver in case the transmitter is in very close proximity to the receiver,
otherwise do not connect.
7
32 IOVDD Power (I/O Digital power supply for the digital core, GIO's SPI, I2C and I2S (1.8V to 3.6V) 10
33 AVDD Power Analog power supply connection for the Radio and PA/LNA (2.0V to 3.6V) 20
34 GND Common