6.11.7 System Module (SYS)
The SYS module handles many of the system functions within the device. These include power-on reset (POR) and power-up clear (PUC) handling, NMI source selection and management, reset interrupt vector generators (see Table 6-9), bootloader entry mechanisms, and configuration management (device descriptors). It also includes a data exchange mechanism through JTAG called a JTAG mailbox that can be used in the application.
Table 6-9 System Module Interrupt Vector Registers
| INTERRUPT VECTOR REGISTER |
INTERRUPT EVENT |
WORD ADDRESS |
OFFSET |
PRIORITY |
| SYSRSTIV, System Reset |
No interrupt pending |
019Eh |
00h |
|
| Brownout (BOR) |
02h |
Highest |
| RST/NMI (POR) |
04h |
|
| DoBOR (BOR) |
06h |
|
| Wakeup from LPMx.5 (BOR) |
08h |
|
| Security violation (BOR) |
0Ah |
|
| SVSL (POR) |
0Ch |
|
| SVSH (POR) |
0Eh |
|
| SVML_OVP (POR) |
10h |
|
| SVMH_OVP (POR) |
12h |
|
| DoPOR (POR) |
14h |
|
| WDT time-out (PUC) |
16h |
|
| WDT key violation (PUC) |
18h |
|
| KEYV flash key violation (PUC) |
1Ah |
|
| Reserved |
1Ch |
|
| Peripheral area fetch (PUC) |
1Eh |
|
| PMM key violation (PUC) |
20h |
|
| Reserved |
22h to 3Eh |
Lowest |
| SYSSNIV, System NMI |
No interrupt pending |
019Ch |
00h |
|
| SVMLIFG |
02h |
Highest |
| SVMHIFG |
04h |
|
| DLYLIFG |
06h |
|
| DLYHIFG |
08h |
|
| VMAIFG |
0Ah |
|
| JMBINIFG |
0Ch |
|
| JMBOUTIFG |
0Eh |
|
| VLRLIFG |
10h |
|
| VLRHIFG |
12h |
|
| Reserved |
14h to 1Eh |
Lowest |
| SYSUNIV, User NMI |
No interrupt pending |
019Ah |
00h |
|
| NMIIFG |
02h |
Highest |
| OFIFG |
04h |
|
| ACCVIFG |
06h |
|
| AUXSWNMIFG |
08h |
|
| Reserved |
0Ah to 1Eh |
Lowest |