NXP Semiconductors MPC5644A Reference Manual page 869

a last-served scheme. Unlike other double transition modes, bm_dt blocks Match A with Transition B (not
with Transition A), so that the second transition blocks both matches.
CaptureA
load enable
MRLEA
Q
T4S
Channel
Service
IPACA[2]
MEF sysclk
Comparator A
0
1
Double Trans.
Trans. Event A
TS1
ucode TDL
SRI
Ordered Modes with Match B Request (m2_o_st, m2_o_dt)
These are ordered match modes on which Match A recognition must precede Match B recognition
(ordered 1->2). Match A asserts MRLA and enables Match B and transitions. Match B asserts MRLB,
generates a match service request, and blocks both transitions.
Freescale Semiconductor
TCCEA
Trans.Event A
ucode ERWA
ucode clr
R MRLEA
MRLA
Q
S
ucode
R
MRLA
T2
TDLA
Q
S
R
T2
Match A SR TransA SR TransB SR
Figure 24-43. Both Match Request Modes (bm_st, bm_dt)
MPC5644A Microcontroller Reference Manual, Rev. 6
Enhanced Time Processing Unit (eTPU2)
TS1
Double Trans.
TS2
ucode ERWB
ucode clr
MRLEB
MRLB
Q
S
R
T2
TDLB
Q
S
R
T2
NOTE: all flip-flops but MRLE reset-dominant;
all control signals active high.
Match B SR
CaptureB
load enable
MRLEB
Q
T4S
Channel
Service
R
IPACB[2]
sysclk
MEF
Comparator B
0
1
ucode
Double Trans.
MRLB
Trans. Event B
TS2
ucode TDL
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