mc9s08rd60fj Freescale Semiconductor, Inc, mc9s08rd60fj Datasheet - Page 71

• Manufacturer Part Number: mc9s08rd60fj
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

5.8.7 System Power Management Status and Control 1 Register (SPMSC1)
LVDF — Low-Voltage Detect Flag
LVDACK — Low-Voltage Detect Acknowledge
LVDIE — Low-Voltage Detect Interrupt Enable
SAFE — SAFE System from interrupts
LVDRE — Low-Voltage Detect Reset Enable
Freescale Semiconductor
Provided LVDE = 1, this read-only status bit indicates a low-voltage detect error.
This write-only bit is used to acknowledge low voltage detection errors (write 1 to clear LVDF). Reads
always return logic 0.
This read/write bit enables hardware interrupt requests for LVDF.
This read/write bit enables hardware to block interrupts and resets from waking the MCU from stop
mode while the supply voltage V
section
writes have no meaning or effect. It is set following a POR and is unaffected by any other resets,
including an LVD reset.
This bit enables the LVD reset function. This bit can be written only once after a reset and additional
NOTES:
Figure 5-8 System Power Management Status and Control 1 Register (SPMSC1)
1. This bit can be written only one time after reset. Additional writes are ignored.
1 = Request a hardware interrupt when LVDF = 1.
0 = Hardware interrupt disabled (use polling).
1 = Interrupts and resets are blocked while supply voltage is below re-arm voltage
0 = Enable pending interrupts and resets
1 = Force an MCU reset when LVDF = 1.
0 = LVDF does not generate hardware resets.
5.6.3 LVD Interrupt and Safe State
Power-on reset:
Any other reset:
Read:
Write:
LVDF
Bit 7
0
0
= Unimplemented or Reserved
DD
LVDACK
6
0
0
0
is below the V
MC9S08RC/RD/RE/RG
LVDIE
Operation.
5
0
0
REARM
SAFE
4
0
0
(1)
voltage. For a more detailed description see
LVDRE
SoC Guide — MC9S08RG60/D Rev 1.10
U
3
1
(1)
U = Unaffected by reset
2
0
0
0
1
0
0
0
Bit 0
0
0
0
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