8.7 Boot Configuration Control Via Expansion Bus - Texas Instruments TMS320C6201 Reference Manual

Boot Configuration Control via Expansion Bus

8.7 Boot Configuration Control via Expansion Bus

The polarity of read/write XW/R and XBLAST control signals on the expansion
bus is determined during boot using pull up/pull down resistors on the XD[31:0]
pins of the expansion bus. Pull up/pull down resistors on the expansion bus
are used for boot mode selection and to enable/disable internal bus arbiter, to
define expansion bus host port mode to define memory type used in each
expansion bus memory space and to define FIFO mode. All expansion data
pins, XD[31:0], should be configured by pull-up/pull-down resistors. Reserved
fields should be pulled-down. Detailed description of boot configuration is
shown in Figure 8–28 and Table 8–20.
Figure 8–28. Expansion Bus Boot Configuration via Pull Up/Pull Down Resistors on
XD[31:0]
31 30 29 28 27 26 25 24 23 22 20 19 18 16
rsvd MTYPE XCE3 rsvd MTYPE XCE2 rsvd MTYPE XCE1 rsvd MTYPE XCE0
15 14 13 12 11 10 9 8 7 5 4 0
Reserved BLPOL RWPOL HMOD XARB FMOD LEND Reserved BOOTMODE
Expansion Bus 8-49