PCF26100ET PHILIPS [NXP Semiconductors], PCF26100ET Datasheet - Page 16

• Manufacturer Part Number: PCF26100ET
• Description: Bluetooth Adapter IC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 21 Register values range and actual timings
6.5.5
The RSSI is read via the serial interface. The UAA3558 provides an analog RSSI output. The interface logic converts the
analog RSSI value and stores the result in a serial interface register. The timing for converting the RSSI is programmed
using the RSSI_start register. The RSSI can only be measured starting 10 s after the S_EN falling edge. The RSSI
value can only be read from the serial interface register after the measurement has been completed, this is at the end of
the packet. RSSI measurements are only done in receive packets.
Table 22 RSSI control word
6.5.6
The transmit power can be controlled from a serial interface register. The 8-bit transmit power control word is used to
control the PA DAC. Writing to the PA DAC register will directly change the PA DAC output. The PA control register
should be written when the transmitter is not active.
Table 23 Unidirectional JTAG PA control word
6.5.7
The values for the GFSK filter are stored in a 13-byte GFSK table. The GFSK table is accessed through a single control
word which is used to store the data in the GFSK table on subsequent writes. To align the writing to the GFSK table a
table address reset bit is available in the Enable register. When the reset bit ‘grst’ in the Enable register is set to a logic 1
the GFSK table address will be reset and the next GFSK control word is written at location 0 in the GFSK table. Every
subsequent write to the GFSK control word will be stored at the next address in the GFSK table. If the last address is
reached, subsequent writes will continue to effect the last address.
The values for the GFSK table depend on the reference voltage on V
of 1.2 V with a peak-to-peak swing of 1 V (amplitude = 0.5 V). For this the values for the GFSK table are calculated as
shown in Table 26.
Table 24 Unidirectional JTAG GFSK control word
2001 Jun 19
S_EN_START
S_EN_WIDTH
T_SW_START
SLCCTR_START
S_EN_PULSE_DEL
RSSI_START
GFSK_DC_BIAS
Bluetooth Adapter IC
REGISTER
GFSK_TABLE
18 (decimal)
24 (decimal)
28 (decimal)
ADDRESS
ADDRESS
RSSI
T
GFSK
RANSMIT POWER CONTROL
TABLE
0 < x < 256
0 < x < 256
S_EN_START < x < 256
0 < x < 256
0 < x < 256
0 < x < 256
0 < x < 256
RANGE
7
7
7
6
6
6
t
t
t
t
t
t
t
2
6
17
13
7
4
10
TIMING
and t
and t
5
5
5
16
5
8
S_EN_START + (0 to 1)
S_EN_WIDTH
T_SW_START + (0 to 1)
SLCCTR_START + 1
S_EN_PULSE_DEL + (0 to 1)
RSSI_START
GFSK_DC_BIAS + (0 to 1)
GFSK table value
PA power control
4
4
4
DDA
RSSI
. The T_GFSK signal should have a DC_Bias
ACTUAL VALUE
3
3
3
2
2
2
Preliminary specification
PCF26100
1
1
1
UNIT
0
0
0
s
s
s
s
s
s
s