参数资料
型号: 73M1903-IVT/F
厂商: Maxim Integrated Products
文件页数: 4/47页
文件大小: 0K
描述: IC MODEM AFE V.22BIS 20-TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 74
通道数: 2
电压 - 电源,模拟: 3 V ~ 3.6 V
电压 - 电源,数字: 3 V ~ 3.6 V
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 管件
73M1903 Data Sheet
DS_1903_032
12
Rev. 2.1
2.2.3
Control Register (CTRL 13): Address 0Dh
Reset State 48h
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Xtal1
Xtal0
Reserved
Unused
Nrst2
Nrst1
Nrst0
Xtal[1:0] :
00 = Xtal osc. bias current at 120
μA
01 = Xtal osc. bias current at 180
μA
10 = Xtal osc. bias current at 270
μA
11 = Xtal osc. bias current at 450
μA
If OSCIN is used as a Clock input, “00” setting should be used to save power(=167
μA at 27.648 MHz).
Nrst[3:0] represents the rate at which the NCO sequence register is reset.
The address 0Dh must be the last register to be written to when effecting a change in PLL.
2.2.4
Control Register (CTRL 14): Address 0Eh
Reset State 00h
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Frcvco
PwdnPLL Reserved
Unused
Frcvco = 1 forces VCO as system clock. This is reset upon
RST, PwdnPLL = 1 or ENFE = 0. Both
PwdnPLL and ENFE are delayed coming out of digital section to keep PLL alive long enough to transition
the system clock to crystal clock when Frcvco is reset by PwdnPLL or ENFE.
PwdnPll = 1 forces Power down of PLL analog section.
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