XR17V254 Datasheet, PDF (70/70 Pages) Exar Corporation – 66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT

XR17V254
PRELIMINARY
66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.0
TA=-40o to +85oC (industrial grade) Supply Voltage, VCC = 3.0 - 3.6V.................................................................. 58
AC ELECTRICAL CHARACTERISTICS FOR 3.3V SIGNALING ............................................................... 59
TA=-40o to+85oC (industrial grade) VCC = 3.0 - 3.6V............................................................................................. 59
FIGURE 19. PCI BUS CONFIGURATION SPACE REGISTERS READ AND WRITE OPERATION................................................................. 60
FIGURE 20. DEVICE CONFIGURATION AND UART REGISTERS READ OPERATION FOR A BYTE OR DWORD ...................................... 61
FIGURE 21. DEVICE CONFIGURATION REGISTERS, UART REGISTERS AND TRANSMIT DATA BURST WRITE OPERATION ..................... 62
FIGURE 22. DEVICE CONFIGURATION REGISTERS, UART REGISTERS AND RECEIVE DATA BURST READ OPERATION ........................ 63
FIGURE 23. 3.3V PCI BUS CLOCK (DC TO 66MHZ) ....................................................................................................................... 64
FIGURE 24. TRANSMIT DATA INTERRUPT AT TRIGGER LEVEL ........................................................................................................... 65
FIGURE 25. RECEIVE DATA READY INTERRUPT AT TRIGGER LEVEL.................................................................................................. 65
PACKAGE DIMENSIONS................................................................................................ 66
REVISION HISTORY...................................................................................................................................... 67
TABLE OF CONTENTS...................................................................................................... I
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