S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 6 Interrupt (S12XINTV2)
6.4.5
Reset Exception Requests
The XINT module supports three system reset exception request types (for details please refer to the Clock
and Reset Generator module (CRG)):
1. Pin reset, power-on reset, low-voltage reset, or illegal address reset
2. Clock monitor reset request
3. COP watchdog reset request
6.4.6
Exception Priority
The priority (from highest to lowest) and address of all exception vectors issued by the XINT module upon
request by the CPU is shown in
Table 6-10.
Generally, all non-maskable interrupts have higher priorities
than maskable interrupts. Please note that between the three software interrupts (Unimplemented op-code
trap request, SWI/BGND request, SYS request) there is no real priority defined because they cannot occur
simultaneously (the S12XCPU executes one instruction at a time).
Table 6-10. Exception Vector Map and Priority
Vector Address
(1)
0xFFFE
0xFFFC
0xFFFA
(Vector base + 0x00F8)
(Vector base + 0x00F6)
(Vector base + 0x0012)
(Vector base + 0x0018)
(Vector base + 0x0016)
(Vector base + 0x0014)
(Vector base + 0x00F4)
(Vector base + 0x00F2)
(Vector base +
0x00F0–0x001A)
Source
Pin reset, power-on reset, low-voltage reset, illegal address reset
Clock monitor reset
COP watchdog reset
Unimplemented op-code trap
Software interrupt instruction (SWI) or BDM vector request
System call interrupt instruction (SYS)
(reserved for future use)
XGATE Access violation interrupt request
(2)
CPU Access violation interrupt request
(3)
XIRQ interrupt request
IRQ interrupt request
Device specific I bit maskable interrupt sources (priority determined by the associated
configuration registers, in descending order)
(Vector base + 0x0010)
Spurious interrupt
1. 16 bits vector address based
2. only implemented if device features both a Memory Protection Unit (MPU) and an XGATE co-processor
3. only implemented if device features a Memory Protection Unit (MPU)
MC9S12XE-Family Reference Manual , Rev. 1.19
274
Freescale Semiconductor
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
NOTE
Care must be taken to ensure that all exception requests remain active until
the system begins execution of the applicable service routine; otherwise, the
exception request may not get processed at all or the result may be a
spurious interrupt request (vector at address (vector base + 0x0010)).
