uaa3515a NXP Semiconductors, uaa3515a Datasheet - Page 24

• Manufacturer Part Number: uaa3515a
• Description: 900 Mhz Analog Cordless Telephone Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.9.6
When the LBD active register = 0, the carrier detector is enabled and the signal CDout is sent to the output pin CDLBD.
If RSSI is above the programmed RSSI level, CDLBD = 0; if RSSI is below the programmed level then CDLBD = 1. The
carrier detector gives an indication if a carrier signal is present on the selected channel. The carrier detector has a
nominal value and tolerance, if a different carrier detect threshold value is desired, this can be programmed through the
microcontroller interface. If the carrier detect range is to be scaled, an external resistor should be connected between
pin RSSI and ground. CD control = 10011 which corresponds to RSSI = 0.86 V (typical DC value).
Table 12 CD levels register
2002 Sep 09
900 MHz analog cordless telephone IC
BIT 4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
C
ARRIER DETECTOR THRESHOLD PROGRAMMING
BIT 3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
BIT 2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BIT 1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
BIT 0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SELECT
24
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
1
2
3
4
5
6
7
8
9
RSSI VOLTAGE THRESHOLD DETECT (V)
0.14
0.18
0.22
0.26
0.34
0.38
0.42
0.46
0.54
0.58
0.62
0.66
0.74
0.78
0.82
0.86
0.94
0.98
1.02
1.06
1.14
1.18
1.22
1.26
1.34
0.1
0.3
0.5
0.7
0.9
1.1
1.3
Product specification
UAA3515A