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| MCS7715 USB to Combo Serial & Printer Port Features * Single 3.3V - 5.0V operation * Low power * Full compliance with the USB V1.1 specification * Standard 16C450/550 compatible UART * Supports 920kbps data rate * Programmable baud rate generator * Modem control signals * 5, 6, 7, 8-bit character selection * Even, odd, no parity, or force parity generations * Status report capability * Single IEEE-1284 compatible printer port * Fast data rates up to 1.5M Bps * 16-byte FIFO * Software programmable printer mode selects * Microsoft compatible * Available in 48-pin LQFP package Applications * High-speed modems * Monitoring equipment * Serial networking * Printer server * Portable backup units * Printer interface Application Note * AN-7715 Evaluation Board * MCS7715-EVB General Description The MCS7715 controller provides bridging between the Universal Serial Bus (USB) input an enhanced UART port and an IEEE-1284 bi-directional printer port. This device contains all the necessary logic to communicate with the host computer via the USB bus. In addition, the MCS7715 contains a 3.3V regulator and operates in bus-powered mode. The MCS7715 has a reduced frequency (6MHz) crystal oscillator. This combination of features allows significant cost savings in system design along with straightforward implementation of serial port functionality into PC peripherals using the host's USB port. Ordering Information Commercial Grade ( 0 C to +70 C ) MCS7715CQ MCS7715CQ-GR 48-LQFP 48-LQFP Standard RoHS Page 2-10 MCS7715 USB to Combo Serial & Printer Port MCS7715 Pin Assignment 41 nAUTOFDX 42 nSTROBE 38 nFAULT 48 VOUT 45 nDTR 44 nCTS 47 GND 39 GND 43 3.3V 40 PD0 5V 3.3V XTAL1 XTAL2 GND TSTPLL TSTMODE GND DM 1 2 3 4 5 6 7 8 9 37 PD1 36 INIT 35 PD2 34 nSLCTIN 33 PD3 32 PD4 31 3.3V 30 GND 29 PD5 28 TX 27 PD6 26 PD7 25 nACK BUSY 24 46 nRI nCD 15 MCS7715CQ DP 10 3.3V 11 RESET 12 GND 13 GND 14 3.3V 16 GND 17 nDSR 18 RX 19 nRTS 20 GND 21 SLCT 22 PE 23 Page 2-11 |
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