參數(shù)資料
型號(hào)： CP2105-F01-GM
廠商： SILICON LABORATORIES
元件分類： 總線控制器
中文描述： UNIVERSAL SERIAL BUS CONTROLLER, QCC24
封裝： 4 X 4 MM, ROHS COMPLIANT, MO-220WGGD, QFN-24
文件頁(yè)數(shù)： 5/24頁(yè)
文件大?。?/td> 201K
代理商： CP2105-F01-GM
CP2105
Rev. 1.0
13
6.1. ECI Baud Rate Generation
The baud rate generator for the enhanced interface is very flexible, allowing the user to request any baud rate in
the range from 300 bps to 2.0 Mbps. If the baud rate cannot be directly generated from the 48 MHz oscillator, the
device will choose the closest possible option. The actual baud rate is dictated by Equation 1 and Equation 2.
Equation 1. Clock Divider Calculation
Equation 2. Baud Rate Calculation
Most baud rates can be generated with an error of less than 1.0%. A general rule of thumb for the majority of UART
applications is to limit the baud rate error on both the transmitter and the receiver to no more than ±2%. The clock
divider value obtained in Equation 1 is rounded to the nearest integer, which may produce an error source. Another
error source will be the 48 MHz oscillator, which is accurate to ±0.25%. Knowing the actual and requested baud
rates, the total baud rate error can be found using Equation 3.
Equation 3. Baud Rate Error Calculation
The UART also supports the transmission of a line break. The length of time for a line break is programmable from
1 to 125 ms, or it can be set to transmit indefinitely until a stop command is sent from the application.
7. GPIO Mode and Modem Mode
Each interface on the CP2105 can be configured in either GPIO Mode or Modem Mode. This allows the SCI and
ECI to have either modem control signals or GPIO signals available at various pins. Table 11 shows the functions
that are available in each mode.By default, both interfaces are configured for GPIO Mode.
Only one mode can be selected for each interface. Also, the mode of the CP2105 can only be configured once and
cannot be reset to the default configuration after being programmed. Refer to “AN223: Port Configuration and
GPIO for CP210x” for more information on how to configure the port pins of the CP2105.
Table 11. CP2105 Modem Mode and GPIO Mode
Interface
Pin #
Modem Mode
GPIO Mode
Standard
Communications
Interface
24
DCD_SCI
GPIO_0_SCI
23
DTR_SCI
GPIO_1_SCI
22
DSR_SCI
GPIO_2_SCI
1
RI_SCI
SUSPEND_SCI
Enhanced
Communications
Interface
15
DTR_ECI
GPIO_0_ECI
14
DSR_ECI
GPIO_1_ECI
17
RI_ECI
SUSPEND_ECI
Clock Divider
48 MHz
2
Prescale
Requested Baud Rate
----------------------------------------------------------------------------------------------------
=
Prescale
4 if Requested Baud Rate
365 bps
=
Prescale
1 if Requested Baud Rate
365 bps
=
Actual Baud Rate
48 MHz
2
Prescale
Clock Divider
-----------------------------------------------------------------------------
=
Prescale
4 if Requested Baud Rate
365 bps
=
Prescale
1 if Requested Baud Rate
365 bps
=
Baud Rate Error (%)
100
1
Actual Baud Rate
Requested Baud Rate
-----------------------------------------------------------
–
0.25%
=
相關(guān)PDF資料
PDF描述
CP2110-F01-GM
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CPC1009N
CPC1014NTR
CPC1014N
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CP2105-F01-GMR 功能描述:輸入/輸出控制器接口集成電路 USB to Dual UART bridge RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 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:QFN-64 封裝:Tray
CP2105-F05-GMR 制造商:Silicon Laboratories Inc 功能描述:USB TO DUAL UART BRIDGE - Tape and Reel
CP2105-GM 制造商:SILABS 制造商全稱:SILABS 功能描述:Data format: 8 data bits, 1 stop bit Parity: Even, Pdd, No parity Baud rates: 2400 bps to 921600 bps
CP2108-B01-GM 功能描述:輸入/輸出控制器接口集成電路 USB to QUAD UART RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 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:QFN-64 封裝:Tray
CP2108-B01-GMR 制造商:Silicon Laboratories Inc 功能描述:USB TO QUAD UART - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC BRIDGE USB TO UART 64QFN 制造商:Silicon Laboratories Inc 功能描述:USB to QUAD UART
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