參數(shù)資料
型號(hào): 73M1822-IM/F
廠商: Maxim Integrated Products
文件頁數(shù): 40/82頁
文件大?。?/td> 0K
描述: MICRODAA VOICE DATA/FAX 42-QFN
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 260
系列: MicroDAA™
應(yīng)用: 傳真,調(diào)制解調(diào)器,尋呼機(jī)
接口: 串行
電源電壓: *
封裝/外殼: 42-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 42-QFN(8x8)
包裝: 管件
安裝類型: 表面貼裝
DS_1x22_017
73M1822/73M1922 Data Sheet
Rev. 1.6
45
7.5
PLL System Timing Control
Table 48 describes the registers used for PLL system timing control.
Table 37: PLL System Timing Controls
Function
Mnemonic
Register
Location
Type
Description
PSEQ
0x08[7:0]
W
Sequence of the divisor. If PRST=0, this register is ignored.
PRST
0x09[7:5]
W
Rate at which the sequence register is reset.
PDVSR
0x09[4:0]
W
Divisor value. Default is 01111.
ICHP
0x0A[7:4]
W
The sizes of the charge pump current in the PLL.
KVCOH
0x0A[2:0]
W
The magnitude of KVCO associated with the VCO within PLL.
The following table shows proper KVCOH values per each
desired PLL VOC frequency.
KVCOH2
KVCOH1
KVCOH0
Fvco
Kvco
0
33 MHz
38 MHz/V
0
1
36 MHz
38 MHz/V
0
1
0
44 MHz
40 MHz/V
0
1
48 MHz
40 MHz/V
1
0
57 MHz
63 MHz/V
1
0
1
61 MHz
63 MHz/V
1
0
69 MHz
69 MHz/V
1
73 MHz
69 MHz/V
NDVSR
0x0B[6:0]
W
Divisor value. If NRST=0, this register is ignored.
NSEQ
0x0C[7:0]
W
Divisor sequence.
LOKDET
0x0D[7]
R
Phase Locked Loop Lock Detect
0 = PLL is not locked. (Default)
1 = PLL is locked to PCLK.
CHNGFS
0x0D[3]
W
Sample Rate Change Sequence Enable
0 = No Fs change sequence generated. (Default)
1 = Fs change sequence is enabled.
Setting this bit to 1 minimizes the barrier power loss period
during the sample rate changes. This bit is recommended to
be set to 1 for the applications requiring dynamic sample rate
changes such as V.34 and V.90 modems, etc.
NRST
0x0D[2:0]
W
Represents the rate at which the NCO sequence register is
reset.
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