MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 152

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Reset Controller Module
5.7.3 Concurrent Resets
5.7.3.1 Reset Flow
5.7.3.2 Reset Status Flags
Advance Information
152
This section describes the concurrent resets. As in the previous
discussion references in parentheses refer to the state numbers in
Figure
If a power-on reset or low-voltage detect condition is detected during any
reset sequence, the reset sequence starts immediately (0).
If the external RESET pin is asserted for at least four rising CLKOUT
edges while waiting for PLL lock or the 512 cycles, the external reset is
recognized. Reset processing switches to wait for the external RESET
pin to negate (8).
If a loss of clock or loss of lock condition is detected while waiting for the
current bus cycle to complete (5, 6) for an external reset request, the
cycle is terminated. The reset status bits are latched (7) and reset
processing waits for the external RESET pin to negate (8).
If a loss of clock or loss of lock condition is detected during the 512 cycle
wait, the reset sequence continues after a PLL lock (9, 9A).
For a POR reset, the POR and LVD bits in the RSR register are set, and
the SOFT, WDR, EXT, LOC, and LOL bits are cleared even if another
type of reset condition is detected during the reset sequence for the
POR.
If a loss of clock or loss of lock condition is detected while waiting for the
current bus cycle to complete (5, 6) for an external reset request, the
EXT, SOFT, and/or WDR bits along with the LOC and/or LOL bits are
set.
If the RSR bits are latched (7) during the EXT, SOFT, and/or WDR reset
sequence with no other reset conditions detected, only the EXT, SOFT,
and/or WDR bits are set.
Freescale Semiconductor, Inc.
For More Information On This Product,
5-4.
Go to: www.freescale.com
Reset Controller Module
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA