NXP Semiconductors MPC5644A, Reference Manual, Page: 953 / 1735

Enhanced Time Processing Unit (eTPU2)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 953
24.5.9.4.3 Dispatch microoperation
Dispatch microoperation is an unconditional branch where the target address is always PC+P[31:24]
(unsigned). Dispatch is affected by FLS field (refer to
Section 24.5.9.4.5, Flush pipeline ). Dispatch
microoperation is defined by R/D field (2 bits, Table 24-114 ). Field R/D can also be used to define return
from sub-routine (see Section 24.5.9.4.4, Return from subroutine ).
100001 N ALU flag 110001 PRSS channel flag
100010 C ALU flag 110010 “Less Than” ALU flag combination (signed)
1
100011 Z ALU flag 110011 “Lower or Equal” ALU flag combination
(unsigned)
2
100100 MV MDU flag 110100 P[24]
100101 MN MDU flag 110101 P[25]
100110 MC MDU flag 110110 P[26]
100111 MZ MDU flag 110111 P[27]
101000 TDLA channel flag 111000 P[28]
101001 TDLB channel flag 111001 P[29]
101010 MRLA channel flag 111010 P[30]
101011 MRLB channel flag 111011 P[31]
101100 LSR channel flag 111100 PSTO channel flag
101101 MB flag MDU flag 111101 PSTI channel flag
101110 FM[1] channel flag 111110 SMLCK semaphore flag
101111 FM[0] channel flag 111111 false
all other values reserved
1
“less than” is a signed comparison, equal to the xor between ALU flags V and N; e.g., 0 < 0xFFFFFF tests
as false (0 < -1).
2
“lower equal” is an unsigned comparison, equal to Z or C; e.g., 0 < 0xFFFFFF tests as true.
Table 24-114. Return and Dispatch – R/D
R/D Meaning
00 return from subroutine (see Section 24.5.9.4.4, Return from subroutine )
01 dispatch jump
10 dispatch call
11 don’t change microinstruction flow
Table 24-113. Branch Condition Selection – BCC
BCC Meaning BCC Meaning