Xce Space Control Registers; Expansion Bus Xce(0/1/2/3) Space Control Register Diagram; Expansion Bus Xce(0/1/2/3) Space Control Register Field Description - Texas Instruments TMS320C6201 Reference Manual

8.3.3

XCE Space Control Registers

Figure 8–4. Expansion Bus XCE(0/1/2/3) Space Control Register Diagram
31 28 27 22
WRITE WRITE
SETUP STROBE
RW, +1111 RW, +111111
Table 8–5. Expansion Bus XCE(0/1/2/3) Space Control Register Field Description
The four XCE space control registers (shown in Figure 8–4 and described in
Table 8–5) correspond to the four XCE memory spaces supported by the ex-
pansion bus.
21 20 19 16
READ
WRITE HOLD
SETUP
RW, +11 RW, +1111
Field Description
MTYPE Memory type is configured during boot using pullup or pulldown
resistors on the expansion bus.
MTYPE=010b: 32-bit wide asynchronous interface.
MTYPE=101b: 32-bit wide FIFO interface.
Others Reserved
The remaining fields are defined in detail in chapter 6, external memory inter-
face in the TMS320C6201/6701 Peripheral Reference Guide (SPRU190B).
These fields are specific to the asynchronous interface and are functionally
equivalent to the fields in the EMIF CE space control registers.
15 14 13 8
READ
rsvd rsvd
STROBE
R, +00 RW, +111111 R, +0
Expansion Bus Registers
7 6 4 3 2
MTYPE rsvd
R,+xx R, +00
Expansion Bus
1 0
READ HOLD
RW, +11
8-9