Enhanced Time Processing Unit (eTPU2)
29-54
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
NOTE
It is necessary to turn VIS bit on to set software breakpoints (see the
eTPU
Reference Manual
for details).
29.3.2.6.2
SCM Low Power
SCM turns off its internal clocks when both Engines are stopped (ETPUECR bit STF asserted), VIS=0 at
ETPUMCR, and MISC is not enabled (SCMMISEN=0). The SCM clocks are automatically turned on if
either one of the STF bits is negated or VIS turns to 1, or SCMMISEN turns to 1.
SCM clocks are not turned off if any of the Engines is not stopped, even if they are both halted.
The conditions for SCM Clocks and MISC activation are summarized in
.
29.3.2.6.3
SCM Off-range Data
When read accesses are made, either by the Host or by a microengine, to addresses above the limit
corresponding to the SCMSIZE value in ETPUMCR, the value read comes from the register
ETPUSCMOFFDATAR. The Host can program the register at initialization with an opcode value with
operations that try to protect or recover the system from runaway code, for instance: terminate the thread,
clear channel flags, disable match and transition service requests, issue an interrupt, jump to an error
recovery procedure
1
. Writes to unimplemented addresses do not return error and can write on unspecified
mirror addresses, so they should be avoided.
Table 29-16. SCM Clocks and MISC activation
ETPUECR_1
STF
ETPUECR_2
STF
ETPUMCR
VIS
ETPUMCR
SCMMISEN
SCM
Clocks
MISC
0
x
0
1
1
VIS cannot be written 1 if ETPUECR_1 bit STF=0 or ETPUECR_2 bit STF=0, and both HLTF
bits are 0.
1
On
On
0
x
0
0
On
off
x
0
0
1
On
On
x
0
0
0
On
off
1
1
0
0
off
off
1
1
0
1
On
On
1
2
2
If VIS=1, neither MDIS can be written 0 nor the Engine leave Stop Mode, regardless of device
stop reques.
1
1
0
On
off
1
1
1
On
off
3
3
MISC resets and stays so when VIS=1, restarting automatically when VIS goes 0 if
SCMMISEN=1.
0
0
x
0
On
off
0
0
x
1
On
On
1.
Only part of these suggested operations can be parallelized in a single instruction. See the eTPU Reference Manual for
details.
Summary of Contents for PXR4030
Page 1: ...PXR40 Microcontroller Reference Manual Devices Supported PXR4030 PXR4040 PXR40RM Rev 1 06 2011...
Page 30: ...PXR40 Microcontroller Reference Manual Rev 1 Freescale Semiconductor xxx...
Page 40: ...PXR40 Microcontroller Reference Manual Rev 1 xl Freescale Semiconductor...
Page 66: ...Memory Map PXR40 Microcontroller Reference Manual Rev 1 2 4 Freescale Semiconductor...
Page 120: ...Signal Descriptions 3 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 860: ...FlexCAN Module 24 50 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 1167: ...Decimation Filter Freescale Semiconductor 28 53 PXR40 Microcontroller Reference Manual Rev 1...
Page 1168: ...Decimation Filter 28 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
