Z8F1601 Datasheet, PDF (167/246 Pages) Zilog, Inc. – Z8 Encore Microcontrollers with Flash Memory and 10-Bit A/D Converter

Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Z8 Encore!^®
149
Program Memory Address 0000H
Table 90. Option Bits At Program Memory Address 0000H
BITS
7
6
5
4
3
2
FIELD ^{WDT_RES WDT_AO}
Reserved
RP
RESET
U
U
U
U
U
U
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ADDR
Program Memory 0000H
Note: U = Unchanged by Reset. R/W = Read/Write.
1
FHSWP
U
R/W
0
FWP
U
R/W
WDT_RES—Watch-Dog Timer Reset
0 = Watch-Dog Timer time-out generates an interrupt request. Interrupts must be globally
enabled for the eZ8 CPU to acknowledge the interrupt request.
1 = Watch-Dog Timer time-out causes a Short Reset. This setting is the default for unpro-
grammed (erased) Flash.
WDT_AO—Watch-Dog Timer Always On
0 = Watch-Dog Timer is automatically enabled upon application of system power. Watch-
Dog Timer can not be disabled.
1 = Watch-Dog Timer is enabled upon execution of the WDT instruction. Once enabled,
the Watch-Dog Timer can only be disabled by a Reset or Stop Mode Recovery. This set-
ting is the default for unprogrammed (erased) Flash.
Reserved
These Option Bits are reserved for future use and must always be set to 1. This setting is
the default for unprogrammed (erased) Flash.
RP—Read Protect
0 = User program code is inaccessible. Limited control features are available through the
On-Chip Debugger.
1 = User program code is accessible. All On-Chip Debugger commands are enabled. This
setting is the default for unprogrammed (erased) Flash.
PS017610-0404
Option Bits