56F8335 datasheet(36/160 Pages) FREESCALE

36 / 160 page

56F8335 Technical Data, Rev. 1

Freescale Semiconductor

Preliminary

1. Cannot be used since MA = EXTBOOT = 0 and the EMI is not available; information in shaded areas not applicable to

56F8335/56F8135.

2. This mode provides maximum compatibility with 56F80x parts while operating externally.

3. “EMI_MODE = 0”, EMI_MODE pin is tied to ground at boot up.

4. “EMI_MODE = 1”, EMI_MODE pin is tied to VDD at boot up.

5. Not accessible in this part, since the EMI is not fully pinned out in this package; information in shaded areas not applicable to

56F8335/56F8135.

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

interrupt priorities. All level 3 interrupts will be serviced before level 2, and so on. For a selected priority

level, the lowest vector number has the highest priority.

The location of the vector table is determined by the Vector Base Address (VBA) register. Please see Part

5.6.11 for the reset value of the VBA.

In some configurations, the reset address and COP reset address will correspond to vector 0 and 1 of the

interrupt vector table. In these instances, the first two locations in the vector table must contain branch or

JMP instructions. All other entries must contain JSR instructions.

Table 4-4 Program Memory Map at Reset

Begin/End

Address

Mode 0 (MA = 0)

Mode 11 (MA = 1)

Internal Boot

External Boot

Internal Boot

16-Bit External Address Bus

EMI_MODE = 02, 3

16-Bit External Address Bus

EMI_MODE = 14

20-Bit External Address Bus

P:$1F FFFF

P:$10 0000

External Program Memory5

P:$0F FFFF

P:$03 0000

External Program RAM5

COP Reset Address = 02 0002

Boot Location = 02 0000

P:$02 FFFF

P:$02 F800

On-Chip Program RAM

4KB

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 RAM5

Internal Program Flash

64KB

P:$00 FFFF

P:$00 0000

Internal Program Flash

64KB

External Program RAM5

COP Reset Address = 00 0002

Boot Location = 00 0000

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