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TMP92CZ26A
92CZ26A-44
3.4.2 Hardware Specifications of Internal Boot ROM
(1) Memory map
Figure 3.4.1 shows a memory map of BOOT mode.
The boot ROM incorporated in the TMP92CZ26A is an 8-Kbyte ROM area mapped to
addresses 3FE000H to 3FFFFFH.
In MULTI mode, the boot ROM is not mapped and the above area is mapped as an
external area.
Note: BROMCR<VACE> = “1” : (B) when booting
BROMCR<VACE> = “0” : (A) when multi mode
Figure 3.4.1 Memory Map of BOOT Mode
(2) Switching the boot ROM area to an external area
After the boot sequence is executed in BOOT mode, an application system program
may start running without a reset being asserted. In this case, it is possible to switch
the boot ROM area to an external area.
Internal I/O
(A) Reset/Interrupt (Note)
Vector Area (256 bytes)
000000H
001FF0H
400000H
FFFF00H
Internal Boot ROM
(8 Kbytes)
3FE000H
3FFF00H
002000H
(B) Reset/Interrupt (Note)
Vector Area (256 bytes)
Internal RAM
(288 Kbytes)
04A000H
010000H
(Internal Backup RAM 16 Kbytes)
046000H
FFFFFFH