T4260_09 Datasheet, PDF (19/34 Pages) ATMEL Corporation – AM/FM Front End IC

T4260
10.12 SW2/AGC (Pin 11)
The pin SW2/AGC works as a switching output (open drain, pin 11) or as an AM AGC-control pin
to control the cascade stage of an external AM-preamplifier.
The SW2/AGC is controlled by bits 47 and 48 as given in Table 10-15.
Table 10-15. Switching Output 2/AGC Mode
SW2/AGC
B48
AGC function
0
High
1
Low
1
Note: In AGC mode, the output voltage is 6V down to 1V.
Figure 10-2. Internal Components at SW2/AGC
SWO/AGC
AGC
SW2
B47
X
0
1
V_S
10.13 Test Mode
A special test mode is implemented for final production test only. This mode is activated by set-
ting bit 123 = 1. This mode is not intended to be used by customer application. For normal
operation bit 123 has to be set to 0.
Table 10-16. Test Mode
Test Mode
ON
OFF
B123
1
0
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4528N–AUDR–11/09