參數(shù)資料
型號： SI3216MPPTX-EVB
廠商： Silicon Laboratories Inc
文件頁數(shù)： 7/122頁
文件大?。?/td> 0K
描述： BOARD EVAL W/DISCRETE INTERFACE
標準包裝： 1
Si3216
104
Rev. 1.0
Not
Recommended
fo
r N
ew
D
esi
gn
s
4. Indirect Registers
Indirect registers are not directly mapped into memory but are accessible through the IDA and IAA registers. A
write to IDA followed by a write to IAA is interpreted as a write request to an indirect register. In this case, the
contents of IDA are written to indirect memory at the location referenced by IAA at the next indirect register update.
A write to IAA without first writing to IDA is interpreted as a read request from an indirect register. In this case, the
value located at IAA is written to IDA at the next indirect register update. Indirect registers are updated at a rate of
16 kHz. For pending indirect register transfers, IAS (direct Register 31) will be one until serviced. In addition, an
interrupt, IND (Register 20), can be generated upon completion of the indirect transfer.
The indirect memory map is different from what is described in the data sheet. The indirect memory map is as
follows:
4.1. Oscillators
See functional description sections of tone generation, ringing, and pulse metering for guidelines on computing
register values. All values are represented in 2s-complement format.
Note: The values of all indirect registers are undefined following the reset state. Shaded areas denote bits that can be read
and written but should be written to zeroes.
Table 35. Si3210 to Si3216 Indirect Register Cross Reference
Si3210
Indirect
Register
Si3216
Indirect
Register
Indirect
Register
Name
Si3210
Indirect
Register
Si3216
Indirect
Register
Indirect
Register
Name
Si3210
Indirect
Register
Si3216
Indirect
Register
Indirect
Register
Name
13
0
OSC1
27
14
ADCG
38
25
NQ34
14
1
OSC1X
28
15
LCRT
39
26
NQ56
15
2
OSC1Y
29
16
RPTP
40
27
VCMR
16
3
OSC2
30
17
CML
41
64
VMIND
17
4
OSC2X
31
18
CMH
43
66
LCRTL
18
5
OSC2Y
32
19
PPT12
99
69
FSK0X
19
6
ROFF
33
20
PPT34
100
70
FSK0
20
7
RCO
34
21
PPT56
101
71
FSK1X
21
8
RNGX
35
22
NCLR
102
72
FSK1
22
9
RNGY
36
23
NRTP
103
73
FSK01
26
13
DACG
37
24
NQ12
104
74
FSK10
Table 36. Oscillator Indirect Registers Summary
Addr. D15
D14
D13
D12
D11
D10
D9
D8D7D6D5D4D3D2D1
D0
0
OSC1[15:0]
1
OSC1X[15:0]
2
OSC1Y[15:0]
3
OSC2[15:0]
4
OSC2X[15:0]
5
OSC2Y[15:0]
6
ROFF[5:0]
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