BGB101 NXP Semiconductors, BGB101 Datasheet - Page 4

• Manufacturer Part Number: BGB101
• Description: 0 Dbm Bluetooth Radio Module
• Manufacturer: NXP Semiconductors

Philips Semiconductors
QUICK REFERENCE DATA
V
FUNCTIONAL DESCRIPTION
Control
The BGB101 Bluetooth Radio Module is controlled by a baseband processor via the serial 3-wire bus. These 3 wires are
data (S_DATA), clock (S_CLK) and enable (S_EN). Data sent to the device is loaded in bursts framed by S_EN. Data
and clock (S_DATA and S_CLK) signals are ignored until S_EN goes low. The programmed information is read directly
into the internal registers when S_EN goes high. S_DATA and S_EN should be stable around the rising edges of S_CLK.
There are internal pull-down resistors on all these three pins.
Only the last 32 bits serially clocked into the device are retained within the register. Additional (leading) bits are ignored,
and no check is made on the number of bits received. The data format is shown in table 1. The first data bit entered is
b31, the last one b0.
The S_EN high-to-low transition also controls the opening of the PLL. A short S_EN high pulse at the end of a time slot,
either TX or RX, serves to reset and power-down the IC. This can be omitted, at the cost of extra power consumption.
In addition to the 3-wire serial bus, there is one control signal used for accurate timing of functions within the IC, under
control by the baseband processor. This is the DCXCTR, to control (in RX mode) the three subsequent operating modes
of the DC compensation circuit: coarse offset estimation during the early part of the Access Code, accurate offset
estimation during the Barker sequence and the trailer, retention of the offset information during the payload.
In addition DCXCTR (in TX mode) is used to switch the output amplifier on independently from the S_EN pulse. This
makes it possible to switch the output amplifier on while the PLL is still active, thus compensating for the frequency jump
(Initial Carrier Frequency Offset) this might otherwise cause.
Transmit mode
The BGB101 Bluetooth Radio Module contains a fully integrated transmitter function. The RF channel frequency is
selected in a conventional synthesizer, which is controlled via the serial 3-wire bus. The VCO is directly modulated by
the signal present on the T_GFSK connection. The Gaussian filtering should therefore be performed externally. The DC
bias voltage for this pin should already be present during the S_EN programming pulse, so that the PLL can correct for
possible frequency errors that might otherwise occur. Also in RX mode, this pin should be connected to a well-defined
and stable DC voltage. The fully integrated VCO operates at double the Bluetooth frequency. The VCO includes an
on-chip regulator which minimizes frequency errors due to V
A carefully designed PLL loop filter keeps frequency drift during open-loop modulation down to a very low value.
2003 Aug 05
V
I
Sens
P
f
f
T
S
S1
0
ref
amb
S1
out
0 dBm Bluetooth radio module
SYMBOL
= 3.0 V; T
+ I
, V
S2
S2
,V
+ I
S3
S3
amb
receiver sensitivity
nominal supply voltage
total supply current
output power
RF frequency
reference input frequency
operating ambient temperature
= 25 C; unless otherwise specified.
PARAMETER
during RX guard space
during demodulation
during TX guard space
during transmission
in power-down mode
BER
under standard conditions
at nominal settings
0.1 % and PER < 0.5 %
CONDITIONS
4
S
variations. This leads to a lower component cost.
2.65
2402
12
2
30
MIN.
2.8
15
40
15
33
10
1
TYP.
82
Preliminary specification
3.4
48
40
30
+4
2480
26
+85
MAX.
75
BGB101
V
mA
mA
mA
mA
dBm
dBm
MHz
MHz
C
A
UNIT