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參數(shù)資料
| 型號： | UAA3515AHL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 900 MHz analog cordless telephone IC |
| 中文描述： | TELECOM, CORDLESS, RF AND BASEBAND CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 X 1.40 MM, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 24/44頁 |
| 文件大?。?/td> | 180K |
| 代理商： | UAA3515AHL |
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2001 Dec 12
24
Philips Semiconductors
Product specification
900 MHz analog cordless telephone IC
UAA3515A
7.9.6
C
ARRIER DETECTOR THRESHOLD PROGRAMMING
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
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SELECT
RSSI VOLTAGE THRESHOLD DETECT (V)
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
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
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
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
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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0.1
0.14
0.18
0.22
0.26
0.3
0.34
0.38
0.42
0.46
0.5
0.54
0.58
0.62
0.66
0.7
0.74
0.78
0.82
0.86
0.9
0.94
0.98
1.02
1.06
1.1
1.14
1.18
1.22
1.26
1.3
1.34
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