PI7C9X7954
PCI Express Quad UART
Datasheet
Page 8 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
Table of Tables
TABLE 4-1 PIN-LIST OF 128-PIN LQFP...........................................................................................................11
TABLE 5-1 MODE SELECTION .........................................................................................................................19
TABLE 5-2 BAUD RATE GENERATOR SETTING ................................................................................................24
TABLE 5-3 SAMPLE BAUD RATE SETTING.......................................................................................................24
TABLE 7-1 UART BASE ADDRESS IN I/O MODE.............................................................................................44
TABLE 7-2 REGISTERS IN I/O MODE ...............................................................................................................45
TABLE 7-3 UART BASE ADDRESS IN MEMORY MODE....................................................................................51
TABLE 7-4 MEMORY-MAP MODE ....................................................................................................................52
TABLE 9-1 ABSOLUTE MAXIMUM RATINGS .....................................................................................................65
TABLE 9-2 DC ELECTRICAL CHARACTERISTICS ..............................................................................................65
TABLE 9-3 TRANSMITTER CHARACTERISTICS.................................................................................................65
TABLE 9-4 RECEIVER CHARACTERISTICS .......................................................................................................66
TABLE 10-1 INPUT CLOCK REQUIREMENTS ....................................................................................................68
List of Figures
FIGURE 3-1 PI7C9X7954 BLOCK DIAGRAM...................................................................................................10
FIGURE 5-1 TRANSMIT AND RECEIVE FIFOS ..................................................................................................20
FIGURE 5-2 INTERNAL LOOPBACK IN PI7C9X7954........................................................................................22
FIGURE 5-3 CRYSTAL OSCILLATOR AS THE CLOCK SOURCE ...........................................................................23
FIGURE 5-4 EXTERNAL CLOCK SOURCE AS THE CLOCK SOURCE....................................................................23
FIGURE 7-1 UART REGISTER BLOCK ARRANGEMENT IN I/O MODE ..............................................................44
FIGURE 7-2 UART REGISTER BLOCK ARRANGEMENT IN MEMORY MODE...................................................51
FIGURE 11-1 PACKAGE OUTLINE DRAWING.....................................................................................................69
13-0093