Datasheet

TEF6901A_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 20 March 2008 38 of 107
NXP Semiconductors
TEF6901A
Integrated car radio
8.2.6 Write mode: data byte BAND
Different PLL charge pump currents are used for different reference frequencies to
maintain best PLL loop stability; see Table 40.
Settings FREF[2:0] = 000 (100 kHz) and FREF[2:0] = 001 (50 kHz) include additional high
current charge pump control to realize fast PLL locking within 1 ms.
Table 36. BAND - format of data byte 05h with default setting (buffered)
7 6 5 4 3 2 1 0
BAND2 BAND1 BAND0 FREF2 FREF1 FREF0 LOINJ 0
0010000
Table 37. BAND - data byte 05h bit description
Bit Symbol Description
7 to 5 BAND[2:0] FM and AM band selection; see
Table 38
4 to 2 FREF[2:0] PLL reference frequency; see
Table 39
1 LOINJ FM mixer 1 image suppression
0 = high injection image suppression
1 = low injection image suppression
0 - reserved; 0 = normal operation
Table 38. Decoding of BAND bits
BAND2 BAND1 BAND0 Divider ratio M Receiver band
000- reserved
0012FM
0103FM
0116AM
1008AM
10110AM
11016AM
11120AM
Table 39. Reference frequencies
FREF2 FREF1 FREF0 f
ref
0 0 0 100 kHz
0 0 1 50 kHz
0 1 0 25 kHz
0 1 1 20 kHz
1 0 0 10 kHz
1 0 1 reserved
1 1 0 reserved
1 1 1 reserved