參數(shù)資料
型號(hào)： SI3211PPTX-EVB
廠商： Silicon Laboratories Inc
文件頁數(shù)： 86/148頁
文件大?。?/td> 0K
描述： BOARD EVAL W/DISCRETE INTERFACE
標(biāo)準(zhǔn)包裝： 1
系列： ProSLIC®
主要目的： 接口，模擬前端（AFE）
已用 IC / 零件： Si3211
已供物品： 板，CD
Si3210/Si3211
42
Rev. 1.61
Not
Recommended
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time the 16-bit counter will reset to zero and begin
counting until the inactive timer expires. The cadence
continues until the user clears the O1TAE and O1TIE
control bits. The zero crossing detect feature can be
implemented by setting the OZ1 bit (direct Register 32,
bit 5). This ensures that each oscillator pulse ends
without a dc component. The timing diagram in
Figure 21 is an example of an output cadence using the
zero crossing feature.
One-shot oscillation can be achieved by enabling O1E
and O1TAE. Direct control over the cadence can be
achieved by controlling the O1E bit (direct Register 32,
bit 2) directly if O1TAE and O1TIE are disabled.
The operation of tone generator 2 is identical to that of
tone generator 1 using its respective control registers.
Note: Tone Generator 2 should not be enabled simultane-
ously with the ringing oscillator due to resource sharing
within the hardware.
Continuous
phase
frequency-shift
keying
(FSK)
waveforms may be created using tone generator 1 (not
available on tone generator 2) by setting the REL bit
(direct Register 32, bit 6), which enables reloading of
the OSC1, OSC1X, and OSC1Y registers at the
expiration of the active timer, OAT1.
Table 29. Associated Tone Generator Registers
Tone Generator 1
Parameter
Description / Range
Register Bits
Location
Oscillator 1 Frequency Coefficient
Sets oscillator frequency
OSC1[15:0]
Indirect Register 13
Oscillator 1 Amplitude Coefficient
Sets oscillator amplitude
OSC1X[15:0]
Indirect Register 14
Oscillator 1 initial phase coefficient
Sets initial phase
OSC1Y[15:0]
Indirect Register 15
Oscillator 1 Active Timer
0 to 8 seconds
OAT1[15:0]
Direct Registers 36 & 37
Oscillator 1 Inactive Timer
0 to 8 seconds
OIT1[15:0]
Direct Register 38 & 39
Oscillator 1 Control
Status and control
registers
OSS1, REL, OZ1,
O1TAE, O1TIE,
O1E, O1SO[1:0]
Direct Register 32
Tone Generator 2
Parameter
Description/Range
Register
Location
Oscillator 2 Frequency Coefficient
Sets oscillator frequency
OSC2[15:0]
Indirect Register 16
Oscillator 2 Amplitude Coefficient
Sets oscillator amplitude
OSC2X[15:0]
Indirect Register 17
Oscillator 2 initial phase coefficient
Sets initial phase
OSC2Y[15:0]
Indirect Register 18
Oscillator 2 Active Timer
0 to 8 seconds
OAT2[15:0]
Direct Registers 40 & 41
Oscillator 2 Inactive Timer
0 to 8 seconds
OIT2[15:0]
Direct Register 42 & 43
Oscillator 2 Control
Status and control
registers
OSS2, OZ2,
O2TAE, O2TIE,
O2E, O2SO[1:0]
Direct Register 33
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