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P5040/P5020 Reference Design Board User Guide, Rev. 0
62
Freescale Semiconductor
Programming Model
NOTE
Not supported for P5040/P5020RDB.
Figure 38. Configuration Sequencer Control Register (PX_VCTL)
NOTE
PWROFF = [Default] ‘0’; normal operations do not interfere with the power
switches.
PWROFF = ‘1’ overrides any user- or APM-initiated power switch event.
7.1.18
VELA Status Register (PX_VSTAT)
The VELA status register can be used to monitor configuration sequencer activity.
NOTE
Not supported for P5040/P5020RDB.
0
1
2
3
4
5
6
7
R
—
—
—
—
WDEN
—
PWROFF
GO
W
Reset
0
0
0
0
0
0
0
0
Offset
0x10
Table 45. PX_VCTL Field Descriptions
Bits
Name
Description
0–3
—
Reserved
4
WDEN
Watchdog Enable
• 0 - Disabled
• 1 - Enabled; must be disabled with 2^29 clock cycles (> 5 min. at 30ns clock)
or the system will reset. At any time the software can reset the bit and
disable the watchdog.
5
—
Reserved
6
PWROFF
Power Off
• [Default] 0 - Normal Power-ON
• 1 - Forced Power-OFF; HW must restore power as the software cannot
force Power-ON.
7
GO
Go
• 0 - VELA sequencer is idle.
• 1 - VELA sequencer starts then halts till software resets GO to ‘0’.