MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 507

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

14.3 Functional Description
The Interrupt Controller is a slave on the IP bus. It contains registers that allow each of
the interrupt sources to be set to one of four priority levels (excluding certain interrupts
that have fixed priority). All of the interrupt requests of a given level are priority encoded
to determine the lowest numerical value of the active interrupt requests for that level.
Within a given priority level, number 0 is the highest priority, and number n-1 (where n is
the total number of interrupt sources) is the lowest priority.
14.3.1 Normal Interrupt Handling
After the INTC determines that an interrupt is to be serviced and which interrupt has the
highest priority, an interrupt vector address is generated. Normal interrupt handling
concatenates the vector base address (VBA) and the vector number to determine the
vector address. In this way, an offset into the vector table is generated for each interrupt.
Freescale Semiconductor
Reserved
Reserved
INT_DIS
14–13
12–6
Field
VAB
IPIC
4–2
1–0
5
0
1
Interrupt Priority Level
These bits reflect the new interrupt priority level bits being sent to the Core. These bits indicate the priority
level needed for a new IRQ to interrupt the current interrupt being sent to the Core. This field is only
updated when the DSC core jumps to a new interrupt service routine.
00
01
10
11
Vector number
This field shows bits [7:1] of the Vector Address Bus used at the time the last IRQ was taken. In the case
of a fast interrupt, it shows the lower address bits of the jump address. This field is only updated when the
DSC core jumps to a new interrupt service routine.
Interrupt disable
This bit allows the user to disable all interrupts.
0
1
This read-only bitfield is reserved and always has the value one.
This read-only bitfield is reserved and always has the value zero.
No interrupt is being sent to the core.
An interrupt is being sent to the core.
Normal operation. (default)
All interrupts disabled.
Required nested exception priority levels are 0, 1, 2, or 3.
Required nested exception priority levels are 1, 2, or 3.
Required nested exception priority levels are 2 or3.
Required nested exception priority level is 3.
INTC_CTRL field descriptions (continued)
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
Preliminary
Description
Chapter 14 Interrupt Controller (INTC)
507