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| 型号： | TEA5766UK/N1/S21,0 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 接收器 |
| 英文描述： | FM, AUDIO SINGLE CHIP RECEIVER, PBGA25 |
| 封装： | 3.30 X 3.25 MM, 0.60 MM HEIGHT, WLCSP-25 |
| 文件页数： | 5/59页 |
| 文件大小： | 273K |
| 代理商： | TEA5766UK/N1/S21,0 |
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TEA5766UK_1
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 01 — 22 March 2007
13 of 59
NXP Semiconductors
TEA5766UK
Stereo FM radio + RDS
The tuner can do an RDS update. This is a preset, but with a 2 ms IF count time. The
tuner will jump to the alternative frequency and check the level and the IF count using a
2 ms count time. When RSSI level check is above the specied level and the IF count
result is within the limits then the tuner will stay at the alternative frequency and stay
muted. The host processor can now decide what to do. If the alternative frequency is not
valid it will jump back to the frequency it came from. The algorithm will nish with the
FRRFLAG being set and generate an interrupt. After this interrupt the TEA5766UK will not
measure the IF count for a period of 15.6 ms. 15.6 ms after completing an RDS jump a
measurement of the IF count will start and hence the IF count result and the IFFLAG will
be updated 31.25 ms after completing the algorithm. The level measurement will start
15.6 ms after the tuning algorithm, so bit LEVFLAG and the RSSI information will be
updated 15.6 ms after the algorithm. The state of the TEA5766UK can be checked by
reading registers: INTFLAG, FRQCHK, IFCHK and LEVCHK. Table 6 shows the possible
states after an RDS update and Figure 5 shows the owchart.
7.21.1 Muting during RDS update
An RDS update (AF jump) is always muted. There are two states after the algorithm has
stopped:
1. The tuner jumps to an alternative frequency which is not valid (according to the
specied SSL limit and xed IF counter limits) and jumps back, then it will get not
muted automatically.
2. The tuner jumps to a valid alternative frequency and stays there. Now it remains in
mute. The host processor can switch to not muted or it keeps the tuner muted and can
check for the presence of RDS data. The recommended method to get not muted is to
do a preset to the current frequency (at a preset an IF count time of 15.6 ms is used,
which gives a more accurate IF count result than the result obtained by the AF jump,
where 2 ms is used).
[1]
This table is valid until 31.25 ms after an RDS update has completed. It shows the outcome of the ag
register when a read is done after INTX has gone LOW with the condition that no other mask bits are set
than shown in the table.
Table 6.
RDS update truth table[1]
Bit
Comment
IFFLAG
BLFLAG
FRRFLAG
0
this cannot occur if INTX has gone LOW and only IFMSK,
FRRMSK and BLMSK were set
0
1
alternative frequency jump successful; radio is tuned to the
alternative frequency and keeps muted
0
1
0
not a valid state
0
1
not a valid state
1
0
not a valid state
101AF jump has been done, but the wanted channel fails the IF
count, the PLL will be set back to the old value
1
0
not a valid state
1
this cannot occur if INTX has gone LOW and only IFMSK,
FRRMSK and BLMSK were set
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| TEA5767HN/V3 | 功能描述:射频收发器 FM RECEIVER RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
| TEA5767HN/V3,118 | 功能描述:射频收发器 FM RECEIVER RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
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