73M1903-IVT/F Maxim Integrated Products, 73M1903-IVT/F Datasheet - Page 12

• Manufacturer Part Number: 73M1903-IVT/F
• Description: IC MODEM AFE V.22BIS 20-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of 73M1903-IVT/F

• Number Of Channels: 2
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Number Of Bits: -

PwdnPll = 1 forces Power down of PLL analog section.
73M1903 Data Sheet
2.2.3 Control Register (CTRL 13): Address 0Dh
Reset State 48h
Xtal[1:0] :
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
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.
12
Bit 7
Xtal1
Bit 7
Frcvco
Bit 6
Xtal0
Bit 6
PwdnPLL Reserved Unused
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
Bit 5
Reserved Reserved Unused
Bit 5
Bit 4
Bit 4
Bit 3
Bit 3
Unused
Bit 2
Nrst2
Bit 2
Unused
Bit 1
Nrst1
Bit 1
Unused
Bit 0
Nrst0
Bit 0
Unused
DS_1903_032
Rev. 2.1