Enhanced Time Processing Unit (eTPU)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
17-37
NOTE
The pending service status bit for a channel is set when a service request is
pending, even if the Channel is disabled (CPR
n
= 0).
17.4.5.8
eTPU Channel Service Status Register (ETPU_CSSR)
ETPU_CSSR holds the current channel service status on whether it is being serviced or not. Only one bit
can be asserted in this register at a given time. When no channel is being serviced, the register read value
is 0x0000_0000. ETPU_CSSR is a read-only register. This register can be read during normal eTPU
operation for monitoring the scheduler activity. For more information on channels being serviced, refer to
the
eTPU Reference Manual
.
NOTE
The ETPU_CSSR is not an absolute indication of channel status. If more
than one source is requesting service, the asserted status bit only indicates
that one of the requests has been granted.
NOTE
Channel service status does not always reflect decoding of the CHAN
register, since the CHAN register can be changed by the service thread
microcode.
Address: Base + 0x0000_0280 (eTPU A)
Access: R/O
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R SR31 SR30 SR29 SR28 SR27 SR26 SR25 SR24 SR23 SR22 SR21 SR20 SR19 SR18 SR17 SR16
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R SR15 SR14 SR13 SR12 SR11 SR10
SR9
SR8
SR7
SR6
SR5
SR4
SR3
SR2
SR1
SR0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 17-20. eTPU Channel Pending Service Status Register (ETPU_CPSSR)
Table 17-21. ETPU_CPSSR Bit Field Descriptions
Field
Description
0–31
SR
n
Pending service request
n
. Indicates a pending service request for channel
n
. The SR status for the pending request
is negated at the time slot transition for the respective service thread.
0 no service request pending for channel
n
1 pending service request for channel
n
Содержание MPC5565
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