Datasheet

TEF6901A_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 20 March 2008 20 of 107
NXP Semiconductors
TEF6901A
Integrated car radio
8.1.5 Read mode: data byte IFBW
8.1.6 Read mode: data byte ID
Table 16. IFBW - format of data byte 4
7 6 5 4 3 2 1 0
RAGC1 RAGC0 ASIA IFBW4 IFBW3 IFBW2 IFBW1 IFBW0
Table 17. IFBW - data byte 4 bit description
Bit Symbol Description
7 and 6 RAGC[1:0] RF AGC indicator; PIN diode current on pins IAMAGC or IFMAGC
00 =
FM: < 0.05 mA
AM: < 0.1 mA
01 =
FM: 0.05 mA to 0.5 mA
AM: 0.1 mA to 0.5 mA
10 = 0.5 mA to 2.5 mA
11 = > 2.5 mA
5 ASIA ASI active; this bit indicates activity of the audio step interpolation
function
0 = ASI is not active
1 = ASI step is in progress
4 to 0 IFBW[4:0] FM IF filter bandwidth control; 57 kHz (0 0000) to 165 kHz (1 1111). The
bandwidth read data equals the write data definition (at DYN = 0; see
Table 28).
Table 18. ID - format of data byte 5
7 6 5 4 3 2 1 0
IFCAPG - - - - ID2 ID1 ID0
Table 19. ID - data byte 5 bit description
Bit Symbol Description
7 IFCAPG IF filter gear; read value is used for IFCAP adjustment (byte IFCAP);
see
Table 47
6 to 3 - reserved
2 to 0 ID[2:0] device type identification 000 = TEF6901A