PXD20RM Datasheet, PDF (1120/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Table 30-4. PCR field descriptions (continued)
Field
Description
EVT_EN
EVTO/EVTI Enable. This bit enables the EVTO/EVTI port functions.
0 EVTO/EVTI port disabled.
1 EVTO/EVTI port enabled.
LP_DBG_EN Low Power Debug Enable. The LP_DBG_EN bit enables debug functionality to support entry and exit
from low power sleep and stop modes.
0 Low power debug disabled.
1 Low power debug enabled.
Note: See also Section 30.8.1, Relationship between TCK and system clock frequency.
SLEEP_
SYNC
Sleep Mode Synchronization. The SLEEP_SYNC bit is used to synchronize the entry into sleep mode
between the device and debug tool. The device sets this bit before a pending entry into sleep mode.
After reading SLEEP_SYNC as set, the debug tool then clears SLEEP_SYNC to acknowledge to the
device that it may enter into sleep mode.
0 Sleep mode entry acknowledge.
1 Sleep mode entry pending.
Note: See also Section 30.8.1, Relationship between TCK and system clock frequency.
STOP_SYNC Stop Mode Synchronization. The STOP_SYNC bit is used to synchronize the entry into stop mode
between the device and debug tool. The device sets this bit before a pending entry into stop mode.
After reading STOP_SYNC as set, the debug tool then clears STOP_SYNC to acknowledge to the
device that it may enter into stop mode.
0 Stop mode entry acknowledge.
1 Stop mode entry pending
PSTAT_EN Processor Status Mode Enable
30.6.2.3 Development Control Register 1, 2 (DC1, DC2)
The development control registers are used to control the basic development features of the Nexus module.
Figure 30-5 shows development control register 1 and Table 30-5 describes the register’s fields.
Nexus 0x0002
Reg:
0
R _OPC
W
Reset ₀
1
2
MCK_DIV
0
0
3
4
EOC
0
0
Access: User read/write
5
6
7
8
0 PTM WEN 0
9
10 11 12 13 14 15
0
0
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
OVC
EIC
TM
W
Reset ₀
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 30-5. Development Control Register 1 (DC1)
30-8
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor