MCF5282CVM66 Datasheet, PDF (611/766 Pages) Freescale Semiconductor, Inc – MCF5282 and MCF5216 ColdFire® Microcontroller User’s Manual

Reset Controller Module
Table 29-2. Reset Controller Memory Map
IPSBAR Offset
Bits 7:0
0x11_0000
RCR
0x11_0001
RSR
0x11_0002
Reserved²
0x11_0003
Reserved²
1 _{S/U = supervisor or user mode access.}
2 _{Writes to reserved address locations have no effect and reads return 0s.}
Access¹
S/U
S/U
—
—
29.4.1 Reset Control Register (RCR)
The RCR allows software control for requesting a reset, for independently asserting the external RSTO
pin, and for controlling low-voltage detect (LVD) functions.
Bit(s)
7
6
5
4
7
6
5
Field SOFTRST FRCRSTOUT —
4
LVDF LVDIE LVDRE —
Reset
0000_0101
R/W
R/W
Address
IPSBAR + 0x11_0000
Figure 29-2. Reset Control Register (RCR)
0
LVDE
Table 29-3. RCR Field Descriptions
Name
SOFTRST
FRCRSTOUT
—
LVDF
Description
Allows software to request a reset. The reset caused by setting this bit clears this bit.
1 Software reset request
0 No software reset request
Allows software to assert or negate the external RSTO pin.
1 Assert RSTO pin
0 Negate RSTO pin
CAUTION: External logic driving reset configuration data during reset needs to be
considered when asserting the RSTO pin when setting FRCRSTOUT.
Reserved, should be cleared.
LVD flag. Indicates the low-voltage detect status if LVDE is set. Write a 1 to clear the
LVDF bit.
1 Low voltage has been detected
0 Low voltage has not been detected
NOTE: The setting of this flag causes an LVD interrupt if LVDE and LVDIE bits are set
and LVDRE is cleared when the supply voltage V_DD drops below V_DD (minimum). The
vector for this interrupt is shared with INT0 of the EPORT module. Interrupt arbitration
in the interrupt service routine is necessary if both of these interrupts are enabled.
Also, LVDF is not cleared at reset, however it will always initialize to a zero since the
part will not come out of reset while in a low-power state (LVDE/LVDRE bits are
enabled out of reset).
Freescale Semiconductor
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
29-3