S12S Debug Module (S12DBGV2)
MC9S12VRP Family Reference Manual Rev. 1.3
NXP Semiconductors
223
RTI
;
The execution flow taking into account the IRQ is as follows
LDX
#SUB_1
MARK1
JMP
0,X
;
IRQ_ISR LDAB
#$F0
;
STAB
VAR_C1
RTI
;
SUB_1
BRN
*
NOP
;
ADDR1
DBNE
A,PART5
;
6.4.5.2.2
Loop1 Mode
Loop1 Mode, similarly to Normal Mode also stores only COF address information to the trace buffer, it
however allows the filtering out of redundant information.
The intent of Loop1 Mode is to prevent the Trace Buffer from being filled entirely with duplicate
information from a looping construct such as delays using the DBNE instruction or polling loops using
BRSET/BRCLR instructions. Immediately after address information is placed in the Trace Buffer, the
DBG module writes this value into a background register. This prevents consecutive duplicate address
entries in the Trace Buffer resulting from repeated branches.
Loop1 Mode only inhibits consecutive duplicate source address entries that would typically be stored in
most tight looping constructs. It does not inhibit repeated entries of destination addresses or vector
addresses, since repeated entries of these would most likely indicate a bug in the user’s code that the DBG
module is designed to help find.
6.4.5.2.3
Detail Mode
In Detail Mode, address and data for all memory and register accesses is stored in the trace buffer. This
mode is intended to supply additional information on indexed, indirect addressing modes where storing
only the destination address would not provide all information required for a user to determine where the
code is in error. This mode also features information bit storage to the trace buffer, for each address byte
storage. The information bits indicate the size of access (word or byte) and the type of access (read or
write).
When tracing in Detail Mode, all cycles are traced except those when the CPU is either in a free or opcode
fetch cycle.
6.4.5.2.4
Compressed Pure PC Mode
In Compressed Pure PC Mode, the PC addresses of all executed opcodes, including illegal opcodes are
stored. A compressed storage format is used to increase the effective depth of the trace buffer. This is
achieved by storing the lower order bits each time and using 2 information bits to indicate if a 64 byte
boundary has been crossed, in which case the full PC is stored.
Each Trace Buffer row consists of 2 information bits and 18 PC address bits
Содержание MC9S12VRP64
Страница 16: ...MC9S12VRP Family Reference Manual Rev 1 3 16 NXP Semiconductors ...
Страница 46: ...Device Overview S12VRP Series MC9S12VRP Family Reference Manual Rev 1 3 46 NXP Semiconductors ...
Страница 92: ...Port Integration Module S12VRPPIMV1 MC9S12VRP Family Reference Manual Rev 1 3 92 NXP Semiconductors ...
Страница 106: ...S12G Memory Map Controller S12GMMCV1 MC9S12VRP Family Reference Manual Rev 1 3 106 NXP Semiconductors ...
Страница 192: ...Background Debug Module S12SBDMV1 MC9S12VRP Family Reference Manual Rev 1 3 192 NXP Semiconductors ...
Страница 236: ...S12S Debug Module S12DBGV2 MC9S12VRP Family Reference Manual Rev 1 3 236 NXP Semiconductors ...
Страница 244: ...Interrupt Module S12SINTV1 MC9S12VRP Family Reference Manual Rev 1 3 244 NXP Semiconductors ...
Страница 340: ...Serial Communication Interface S12SCIV6 MC9S12VRP Family Reference Manual Rev 1 3 340 NXP Semiconductors ...
Страница 358: ...Timer Module TIM16B2CV3 MC9S12VRP Family Reference Manual Rev 1 3 358 NXP Semiconductors ...
Страница 424: ...LIN Physical Layer S12LINPHYV2 MC9S12VRP Family Reference Manual Rev 1 3 424 NXP Semiconductors ...
Страница 436: ...Supply Voltage Sensor BATSV2 MC9S12VRP Family Reference Manual Rev 1 3 436 NXP Semiconductors ...
Страница 488: ...64 KByte Flash Module S12FTMRG64K4KV2 MC9S12VRP Family Reference Manual Rev 1 3 488 NXP Semiconductors ...
Страница 528: ...NVM Electrical Parameters MC9S12VRP Family Reference Manual Rev 1 3 528 NXP Semiconductors ...
Страница 529: ...MC9S12VRP Family Reference Manual Rev 1 3 NXP Semiconductors 529 Appendix J Package Information ...
Страница 530: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 530 NXP Semiconductors ...
Страница 531: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 NXP Semiconductors 531 ...
Страница 532: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 532 NXP Semiconductors ...