Nexus Development Interface (NDI)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
20-10
Freescale Semiconductor
Preliminary
20.4.2.3
Development Control Register 1, 2 (DC1, DC2)
The development control registers are used to control the basic development features of the Nexus module.
shows development control register 1 and
describes the register’s fields.
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.
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
bits 7–1
Reserved.
PSTAT_EN
Processor Status Mode Enable. MPC5510 does not support the PSTAT mode. Setting PSTAT_EN will
drive zeros to the MDO and MSEO pins.
Nexus Reg: 0x0002
Access: User read/write
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R OPC
MCK_DIV
EOC
0
PTM
WEN
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
OVC
EIC
TM
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 20-5. Development Control Register 1 (DC1)
Table 20-5. DC1 Field Descriptions
Field
Description
OPC
1
Output Port Mode Control.
0 Reduced-port mode configuration (4 MDO pins).
1 Full-port mode configuration (8 MDO pins).
MCK_DIV
1
MCKO Clock Divide Ratio (see note below).
00 MCKO is 1x processor clock frequency.
01 MCKO is 1/2x processor clock frequency.
10 MCKO is 1/4x processor clock frequency.
11 MCKO is 1/8x processor clock frequency.
Table 20-4. PCR Field Descriptions (continued)
Field
Description