Datasheet
Interrupt Vector Table
56F8346 Technical Data, Rev. 15
Freescale Semiconductor 45
Preliminary
in the 56F8346/56F8146).
The EMI_MODE pin also affects the reset vector address, as provided in Table 4-4. Additional pins must
be configured as address or chip select signals to access addresses at P:$10 0000 and above.
Note: Program RAM is NOT available on the 56F8146 device.
4.3 Interrupt Vector Table
Table 4-5 provides the reset and interrupt priority structure, including on-chip peripherals. The table is
organized with higher-priority vectors at the top and lower-priority interrupts lower in the table. The
priority of an interrupt can be assigned to different levels, as indicated, allowing some control over
Table 4-4 Program Memory Map at Reset
Begin/End
Address
Mode 0 (MA = 0)
Mode 1
1
(MA = 1)
1. If Flash Security Mode is enabled, EXTBOOT Mode 1 cannot be used. See Security Features, Part 7.
Internal Boot External Boot
Internal Boot
16-Bit External Address Bus
EMI_MODE = 0
2
,
3
16-Bit External Address Bus
2. This mode provides maximum compatibility with 56F80x parts while operating externally.
3. “EMI_MODE =0” when EMI_MODE pin is tied to ground at boot up.
EMI_MODE = 1
4
20-Bit External Address Bus
4. “EMI_MODE =1” when EMI_MODE pin is tied to V
DD
at boot up.
P:$1F FFFF
P:$10 0000
External Program Memory
5
5. Not accessible in reset configuration, since the address is above P:$00 FFFF. The higher bit address/GPIO (and/or chip se-
lects) pins must be reconfigured before this external memory is accessible.
External Program Memory
5
External Program Memory
5
P:$0F FFFF
P:$03 0000
External Program RAM
COP Reset Address = 02 0002
6
Boot Location = 02 0000
6
6. Booting from this external address allows prototyping of the internal Boot Flash.
P:$02 FFFF
P:$02 F800
On-Chip Program RAM
4KB
P:$02 F7FF
P:$02 1000
Reserved
116KB
P:$02 0FFF
P:$02 0000
Boot Flash
8KB
COP Reset Address = 02 0002
Boot Location = 02 0000
Boot Flash
8KB
(Not Used for Boot in this Mode)
P:$01 FFFF
P:$01 0000
External Program RAM
5
Internal Program Flash
7
128KB
7. The internal Program Flash is relocated in this mode making it accessible.
P:$00 FFFF
P:$00 0000
Internal Program Flash
128KB
External Program RAM
COP Reset Address = 00 0002
Boot Location = 00 0000