Silicon Laboratories Si4704 Series Programming Manual page 189

Table 42. Command Timing Parameters for the FM Receiver
*Note: t is seek time per channel. Total seek time depends on bandwidth, channel spacing, and number of channels to
STC
next valid channel.
Worst case seek time complete for FM_SEEK_START is:
FM_SEEK_BAND_TOP FM_SEEK_BAND_BOTTOM
⎛ ⎛
--------------------------------------------------------------------------------------------------------------------------------------------------
⎝ ⎝
for USA FM:
10790 8750
⎛ ⎛
----------------------------------- -
⎝ ⎝
Table 43. Command Timing Parameters for the AM Receiver
Command
POWER_UP
POWER_DOWN
GET_REV
GET_PROPERTY
GET_INT_STATUS
AM_RSQ_STATUS
AM_TUNE_STATUS
AM_TUNE_FREQ
AM_SEEK_START
SET_PROPERTY
GPIO_CTL
GPIO_SET
*Note: t is seek time per channel. Total seek time depends on bandwidth, channel spacing, and number of channels to
STC
next valid channel.
Worst case seek time complete for AM_SEEK_START is:
⎛
⎝
for USA AM:
–
FM_SEEK_FREQ_SPACING
–
⎞ ⎞
×
1 60 ms 6.2 s
+ =
⎠ ⎠
20
t
CTS
110 ms
300 µs
AM_SEEK_BAND_TOP AM_SEEK_BAND_BOTTOM –
⎛
-------------------------------------------------------------------------------------------------------------------------------------------------- -
⎝
AM_SEEK_FREQ_SPACING
1710 520 –
⎛ ⎛
---------------------------- -
⎝ ⎝
10
Confidential Rev. 0.2
⎞ ⎞
×
+ 1 t STC
⎠ ⎠
t
STC
—
—
—
—
—
—
—
80 ms
80 ms*
—
—
—
⎞
⎠
⎞ ⎞
×
+ 1 80 ms = 9.6 s
⎠ ⎠
AN332
t
COMP
—
—
—
—
—
—
1 µs
—
—
—
10 ms
—
—
⎞
×
+ 1 t STC
⎠
t
INT
189