參數(shù)資料
型號(hào)： TUSB5052B
廠商： Texas Instruments, Inc.
英文描述： USB to 2-Serial + 1-Parallel Controller With Configurable Optional Hub
中文描述： USB轉(zhuǎn)2 -串行接口1 -可配置可選并行控制器集線器
文件頁(yè)數(shù)： 11/84頁(yè)
文件大?。?/td> 276K
代理商： TUSB5052B
2–1
2 Main Features
2.1
General Features
Fully compliant with USB release 1.1 specifications
Supports 12-Mbps USB data rate (full speed)
Supports USB suspend and resume operations
One upstream port and five downstream ports (full and low speed)
Can support a total of 8-input and 8-output endpoints
Dual-enhanced UARTS
Integrated 8052 microcontroller with
256
×
8 RAM for internal data
6K
×
8 ROM (with USB and I
2
C boot loader)
16K
×
8 RAM for code space. Totally loadable from host or I
2
C port.
2K
×
8 synchronous RAM used for data buffers and EDBs
Two 8052 GPIO ports, Port-1 and Port-3
Master I
2
C controller for external device accesses.
Supports external microcontroller interface for development ease
Built-in five channel DMA controller for USB/UART/P-port bulk I/O
Operates from a 6-MHz crystal. On-chip PLL generates 48/24 MHz and 7.384615 MHz for internal
baud-rate generator.
Power-down mode
Available in 100 TQFP
3.3/5-V operation
2.2
Enhanced UART Features
Software/hardware flow control
Programmable Xon/Xoff characters
Programmable auto-RTS*/DTR* and auto-CTS*/DSR*
Automatic RS485-bus transceiver control, with and without echo
Software selectable baud rate from 50 to 460,800 baud
Programmable serial-interface characteristics
5-, 6-, 7- or 8-bit characters
Even, odd, or no parity-bit generation and detection
1, 1.5 or 2 stop-bit generation
Line break generation and detection
Internal test and loop-back capabilities
Modem-control functions (CTS*, RTS*, DSR*, DTR*, RI*, and DCD*)
Internal diagnostics capability
Loopback control for communications link-fault isolation
Break, parity, overrun, framing-error simulation
2.3
IEEE-1284 Port
Compatible with standard Centronics parallel interface
Support for SPP, ECP and EPP modes with DMA support
Direct connection to printer without external transceivers
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