SM320F2812 Datasheet, PDF (29/138 Pages) Texas Instruments – Digital Signal Processors

0x00 0000
Data Space
Prog Space
XD(15:0)
Functional Overview
0x00 2000
0x00 4000
0x00 6000
0x08 0000
0x10 0000
0x18 0000
0x3F C000
0x40 0000
XINTF Zone 0
(8K × 16)
XINTF Zone 1
(8K × 16)
XINTF Zone 2
(512K × 16)
XINTF Zone 6
(512K × 16)
XINTF Zone 7
(16K × 16)
(mapped here if MP/MC = 1)
XA(18:0)
XZCS0
XZCS1
XZCS0AND1
XZCS6
XZCS2
XZCS6AND7
XZCS7
XWE
XRD
XR/W
XREADY
XMP/MC
XHOLD
XHOLDA
XCLKOUT
NOTES: A. The mapping of XINTF Zone 7 is dependent on the XMP/MC device input signal and the MP/MC mode bit (bit 8 of XINTCNF2
register). Zones 0, 1, 2, and 6 are always enabled.
B. Each zone can be programmed with different wait states, setup and hold timing, and is supported by zone chip selects
(XZCS0AND1, XZCS2, XZCS6AND7), which toggle when an access to a particular zone is performed. These features enable
glueless connection to many external memories and peripherals.
C. The chip selects for Zone 0 and 1 are ANDed internally together to form one chip select (XZCS0AND1). Any external memory
that is connected to XZCS0AND1 is dually mapped to both Zones 0 and Zone 1.
D. The chip selects for Zone 6 and 7 are ANDed internally together to form one chip select (XZCS6AND7). Any external memory
that is connected to XZCS6AND7 is dually mapped to both Zones 6 and Zone 7. This means that if Zone 7 is disabled (via the
MP/MC mode) then any external memory is still accessible via Zone 6 address space.
Figure 3−3. External Interface Block Diagram
December 2004 − Revised September 2006
SGUS053B
29