NXP Semiconductors MPC5644A, Reference Manual, Page: 815 / 1735

Enhanced Time Processing Unit (eTPU2)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 815
24.5.1.1.4 Alternate condition encoding scheme
This scheme is shown in Table 24-37 . Because the HSR bits cannot be tested by microcode, only three
distinct Host Service Request can be used:
1. HSR = 010 or 011, which are coded into the same Entry Points (0 to 3)
2. HSR = 100,101 or 001, which are all coded into Entry Point 4
3. HSR = 110 or 111, which are both coded into Entry Point 5
The remaining Entry Points use both channel flags for better state decoding, making this scheme better
suited for Functions which need more states and/or faster state decoding, without needing many HSRs.
21 10101
000
0
1 1 0
x
1
22 10110
000
0
1 1 1
x
0
23 10111
000
0
1 1 1
x
1
24 11000
000 1 0 0
0 x 0
25 11001
000 1 0 0 0
x
1
26 11010
000 1 0 0 1
x
0
27 11011
000 1 0 0 1
x
1
28 11100
000 1 0 1
x x 0
29 11101
000 1 0 1
x x
1
30
11110 000 1 1
0 x x
0
31
11111 000 1 1 0
x x
1
Host Service Request
1
The ETPU_CxCR bit ETPD selects between input and output pin state.
Table 24-36. Standard channel condition encoding scheme (continued)
No.
Encoded
channel
condition
s [C4-C0]
Host
service
request
bits
Link
request
MatchA /
TransB
Match.2 /
TransA
In/Output
pin state
1
Channel
flag1
Channel
flag0