Z8F1680SH020SG Datasheet, PDF (66/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
41
Bit
Description (Continued)
[4]
External Reset Indicator
EXT
If this bit is set to 1, a Reset initiated by the external RESET pin occurs. A POR or a Stop
Mode Recovery from a change in an input pin resets this bit. Reading this register resets
this bit.
[3:1]
Reserved; must be 0.
[0]
Low-Voltage Detection Indicator
LVD
If this bit is set to 1 the current state of the supply voltage is below the low-voltage detection
threshold. This value is not latched but is a real-time indicator of the supply voltage level.
Table 13. Reset Status Per Event
Reset or Stop Mode Recovery Event
Power-On Reset or VBO Reset
Reset using RESET pin assertion
Reset using Watchdog Timer time-out
Reset using the On-Chip Debugger (OCTCTL[1] set to 1)
Reset from STOP Mode using DBG Pin driven Low
Stop Mode Recovery using GPIO pin transition
Stop Mode Recovery using Watchdog Timer time-out
POR STOP WDT
EXT
1
0
0
0
0
0
0
1
0
0
1
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
1
0
PS025015-1212
P R E L I M I N A R Y Reset, Stop Mode Recovery and Low-Voltage