xe8802 Semtech Corporation, xe8802 Datasheet - Page 44

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

6.4
There are 5 reset sources:
© Semtech 2006
Reset handling capabilities
• Power On Reset (POR)
• External reset from the NRESET pin
• Programmable port A input combination
• Programmable watchdog timer reset
• Programmable BusError reset on processor access outside the allocated memory map
3 – 0
2 – 0
Pos.
Pos.
Pos.
7 - 4
7
6
5
4
7
6
5
4
3
3
2
1
0
RegSysCtrl
SleepEn
EnResetPConf
EnBusError
EnResetWD
-
RegSysReset
Sleep
SleepFlag
ResetBusError
ResetWD
ResetfromportA
RegSysWd
-
WDKey[3]
WDCounter[3]
WDKey[2]
WDCounter[2]
WDKey[1]
WDCounter[1]
WDKey[0]
WDCounter[0]
Rw
r w
r w
r w
r w
r
Rw
rw
r c
r c
r c
r c
r
Rw
r
w
r
w
r
w
r
w
r
XE8802 Sensing Machine Data Acquisition MCU
Table 6-3. RegSysReset register
Table 6-2. RegSysCtrl register.
Table 6-4. RegSysWd register
Reset
0 nresetcold
0 nresetcold
0 nresetcold
0 nresetcold
0000
Reset
0 nresetglobal
0 nresetcold
0 nresetcold
0 nresetcold
0 nresetcold
000
Reset
0000
0 nresetglobal
0 nresetglobal
0 nresetglobal
0 nresetglobal
6-3
with ZoomingADC™ and LCD driver
Function
enables Sleep mode
enables the nresetpconf signal when the
nresetglobal is active
enables reset from BusError
enables reset from Watchdog
this bit can not be set to 0 by SW
unused
Function
Sleep mode control (reads always 0)
Sleep mode was active before
reset source was BusError
reset source was Watchdog
reset source was Port A combination
unused
Function
unused
Watchdog Key bit 3
Watchdog counter bit 3
Watchdog Key bit 2
Watchdog counter bit 2
Watchdog Key bit 1
Watchdog counter bit 1
Watchdog Key bit 0
Watchdog counter bit 0
0: sleep mode is disabled
1: sleep mode is enabled
0: nresetpconf is disabled
1: nresetpconf is enabled
0: BusError reset source is disabled
1: BusError reset source is enabled
0: Watchdog reset source is disabled
1: Watchdog reset source is enabled
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