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| 型號： | 73M1903C-IM |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, QCC32 |
| 封裝： | LEAD FREE, QFN-32 |
| 文件頁數(shù)： | 3/45頁 |
| 文件大?。?/td> | 459K |
| 代理商： | 73M1903C-IM |
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73M1903C
Modem Analog Front End
DATA SHEET
Page: 11 of 45
2005 TERIDIAN Semiconductor Corporation
Rev 3.4
GPIO
The TERIDIAN 73M1903C modem AFE device provides 8 user defined I/O pins. Each pin is programmed
separately as either an input or an output by a bit in a direction register. If the bit in the direction register is
set high, the corresponding pin is an input whose value is read from the GPIO data register. If it is low,
the pin will be treated as an output whose value is set by the GPIO data register.
To avoid unwanted current contention and consumption in the system from the GPIO port before the
GPIO is configured after a reset, the GPIO port I/Os are initialized to a high impedance state. The input
structures are protected from floating inputs, and no output levels are driven by any of the GPIO pins.
The GPIO pins are configured as inputs or outputs when the host controller (or DSP) writes to the GPIO
direction register. The GPIO direction and data registers are initialized to all ones (FFh) upon reset.
GPIO Data (GPIO): Address 02h
Reset State FFh
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
GPIO7
GPIO6
GPIO5
GPIO4
GPIO3
GPIO2
GPIO1
GPIO0
Bits in this register will be asserted on the GPIO(7:0) pins if the corresponding direction register bit is a 0.
Reading this address will return data reflecting the values of pins GPIO(7:0).
GPIO Direction (DIR): Address 03h
Reset State FFh
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
DIR7
DIR6
DIR5
DIR4
DIR3
DIR2
DIR1
DIR0
This register is used to designate the GPIO pins as either inputs or outputs. If the register bit is low, the
corresponding GPIO pin is programmed as an output. If the register bit is a 1, the corresponding pin will
be treated as an input.
ANALOG I/O
Figure 6 on page 12 shows the block diagram of the analog front end. The analog interface circuit uses
differential transmit and receive signals to and from the external circuitry.
The hybrid driver in the TERIDIAN 73M1903C IC is capable of connecting directly, but not limited to, a
transformer-based Direct Access Arrangement (DAA). The hybrid driver is capable of driving the DAA’s
line coupling transformer and load impedance. The hybrid drivers can also drive high impedance loads
without modification. The class AB behavior of the amplifiers provides load dependent power
consumption.
An on-chip band gap voltage is used to provide an internal voltage reference and bias currents for the
analog receive and transmit channels. The reference derived from the bandgap, nominally 1.25 Volts, is
multiplied to 1.36 Volts and output at the VREF pin. Several voltage references, nominally 1.25 Volts, are
used in the analog circuits. The band gap and reference circuits are disabled after a chip reset since the
ENFE bit is reset to a default state of zero. When ENFE=0, the band gap voltage and the analog bias
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73M1903C-IM/F | 功能描述:電信線路管理 IC Modem Analog Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 73M1903C-IM/F1 | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 73M1903C-IMR/F | 功能描述:電信線路管理 IC Modem Analog Front End RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 73M1903C-IMR/F1 | 功能描述:電信線路管理 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| 73M1903-EVM-600 | 功能描述:網(wǎng)絡(luò)開發(fā)工具 73M1903 w/Ppu & 600 Ohm Term-Usa & Japan RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
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