參數(shù)資料
型號(hào)： MCP2200-I/SS
廠商： Microchip Technology
文件頁(yè)數(shù)： 42/44頁(yè)
文件大?。?/td> 0K
描述： IC USB TO UART 20SSOP
特色產(chǎn)品： MCP2200 USB-to-UART Serial Converter
標(biāo)準(zhǔn)包裝： 67
特點(diǎn)： USB 至 UART
通道數(shù)： 8
FIFO's： 256 字節(jié)
規(guī)程： USB 2.0
電源電壓： 3 V ~ 5.5 V
帶自動(dòng)流量控制功能： 是
安裝類型： 表面貼裝
封裝/外殼： 20-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 20-SSOP
包裝： 管件
產(chǎn)品目錄頁(yè)面： 684 (CN2011-ZH PDF)
工具箱： AC160135-1-KIT-ND - KIT
2011 Microchip Technology Inc.
DS22228B-page 7
MCP2200
FIGURE 1-4:
TYPICAL POWER SUPPLY
OPTION USING THE 5V
PROVIDED BY THE USB
1.5.2.3
3.3V Self Powered
Typically, many embedded applications are using 3.3V
power supplies. When such an option is available in the
target system, MCP2200 can be powered up from the
existing 3.3V power supply rail. The typical connections
for MCP2200 are shown in Figure 1-5.
In this example MCP2200 has both VDD and VUSB lines
tied to the 3.3V rail. These tied connections disable the
internal USB transceiver LDO of the MCP2200 to reg-
ulate the power supply on VUSB pin. Another conse-
quence is that the ‘1’ logical level on the GPIO pins will
be at the 3.3V level, in accordance with the variations
FIGURE 1-5:
USING AN EXTERNALLY
PROVIDED 3.3V POWER
SUPPLY
1.6
GPIO Module
The GPIO Module is a standard 8-bit I/O port.
1.6.1
CONFIGURABLE PIN FUNCTIONS
The pins can be configured as:
GPIO – individually configurable general purpose
input or output
SSPND – USB Suspend state
USBCFG – indicates USB configuration status
RxLED – indicates USB receive traffic
TxLED – indicates USB transmit traffic
1.6.1.1
SSPND Pin Function
The SSPND pin (if enabled) reflects the USB state
(Suspend/Resume). The pin is active ‘low’ when the
Suspend state has been issued by the USB host.
Likewise, the pin drives ‘high’ after the Resume state is
achieved.
This pin allows the application to go into Low Power
mode when USB communication is suspended, and
switches to a full active state when USB activity is
resumed.
1.6.1.2
USBCFG Pin Function
The USBCFG pin (if enabled) starts out ‘low’ during
power-up or after Reset, and goes ‘high’ after the
device successfully configures to the USB. The pin will
go ‘low’ when in Suspend mode and ‘high’ when the
USB resumes.
LDO
3.3V
USB
Transceiver
D+
VDD
VUSB
D-
IN
OUT
5V (USB Bus)
or external
power supply
LDO
3.3V
D+
VDD
VUSB
D-
IN
OUT
5V (USB Bus)
or external
power supply
External
USB
Transceiver
3.3V
LDO
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