mc56f801 Freescale Semiconductor, Inc, mc56f801 Datasheet - Page 43

• Manufacturer Part Number: mc56f801
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Part 5 Interrupt Controller (ITCN)
5.1 Introduction
The Interrupt Controller (ITCN) module is used to arbitrate between various interrupt requests (IRQs), to
signal to the 56800E core when an interrupt of sufficient priority exists, and to what address to jump in
order to service this interrupt.
5.2 Features
The ITCN module design includes these distinctive features:
For further information, see
5.3 Functional Description
The Interrupt Controller is a slave on the IPBus. It contains registers that allow each of the 46 interrupt
sources to be set to one of four priority levels (excluding certain interrupts that are of fixed priority). Next,
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 45 is the lowest.
Freescale Semiconductor
Preliminary
•
•
•
•
Programmable priority levels for each IRQ
Two programmable Fast Interrupts
Notification to SIM module to restart clocks out of Wait and Stop modes
Ability to drive initial address on the address bus after reset
FM_USTAT
FM_CMD
FM_DATA
FM_OPT1
FM_TSTSIG
Register Acronym
Table 4-22 Flash Module Registers Address Map (Continued)
Table
Address Offset
4-2, Interrupt Vector Table Contents.
$1A
$1B
$1D
$13
$14
$15
$16
$17
$18
$19
56F8014 Technical Data, Rev. 9
(FM_BASE = $00 F400)
User Status Register
Command Register
Reserved
Reserved
Reserved
Data Buffer Register
Reserved
Reserved
Optional Data 1 Register
Reserved
Test Array Signature Register
Register Description
Introduction
43