MC56F8035VLD Freescale Semiconductor, MC56F8035VLD Datasheet - Page 58

• Manufacturer Part Number: MC56F8035VLD
• Description: Digital Signal Processors & Controllers - DSP, DSC 16 BIT DSPHC 64KB
• Manufacturer: Freescale Semiconductor

Specifications of MC56F8035VLD

• Rohs: yes
• Core: 56800E
• Data Bus Width: 16 bit
• Program Memory Size: 64 KB
• Data Ram Size: 8 KB
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 3
• Device Million Instructions Per Second: 32 MIPs
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Package / Case: LQFP-44
• Mounting Style: SMD/SMT

The IPIC bits of the ICTRL register reflect the state of the priority level being presented to the 56800E
core.
5.3.3
Fast interrupts are described in the DSP56800E Reference Manual. The interrupt controller recognizes
Fast Interrupts before the core does.
A Fast Interrupt is defined (to the ITCN) by:
When an interrupt occurs, its vector number is compared with the FIM0 and FIM1 register values. If a
match occurs, and it is a level 2 interrupt, the ITCN handles it as a Fast Interrupt. The ITCN takes the vector
address from the appropriate FIVALn and FIVAHn registers, instead of generating an address that is an
offset from the VBA.
The core then fetches the instruction from the indicated vector address and if it is not a JSR, the core starts
its Fast Interrupt handling.
58
1. Setting the priority of the interrupt as level 2, with the appropriate field in the IPR registers
2. Setting the FIMn register to the appropriate vector number
3. Setting the FIVALn and FIVAHn registers with the address of the code for the
Fast Interrupt Handling
SR[9] (I1) SR[8] (I0)
IPIC_VALUE[1:0]
0
0
1
1
00
01
10
11
Table 5-1 Interrupt Mask Bit Definition
Table 5-2 Interrupt Priority Encoding
0
1
0
1
56F8035/56F8025 Data Sheet, Rev. 6
No interrupt or SWILP
Current Interrupt
Exceptions Permitted
Priority Level
Priority 2 or 3
Priorities 0, 1, 2, 3
Priorities 1, 2, 3
Priority 0
Priority 1
Priorities 2, 3
Priority 3
Exception Priority
Priorities 0, 1, 2, 3
Required Nested
Priorities 1, 2, 3
Exceptions Masked
Priorities 2, 3
Priorities 0, 1, 2
Priority 3
Priorities 0, 1
Priority 0
None
Fast Interrupt
Freescale Semiconductor