z8f0813 ZiLOG Semiconductor, z8f0813 Datasheet - Page 155

• Manufacturer Part Number: z8f0813
• Description: High-performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 88. Flash Options Bits at Program Memory Address 0001H
BITS
FIELD
RESET
R/W
ADDR
Note: U = Unchanged by Reset. R/W = Read/Write.
PS024314-0308
Flash Program Memory Address 0001H
R/W
U
7
Watchdog Timer can only be disabled by a Reset or Stop Mode Recovery. This setting is
the default for unprogrammed (erased) Flash.
Reserved—R/W bits must be 1 during writes; 1 when read.
VBO_AO—Voltage Brownout Protection Always ON
0 = Voltage Brownout Protection can be disabled in STOP mode to reduce total power
consumption. For the block to be disabled, the power control register bit must also be writ-
ten (see
1 = Voltage Brownout Protection is always enabled including during STOP mode. This
setting is the default for unprogrammed (erased) Flash.
FRP—Flash 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.
Reserved—Must be 1
FWP—Flash Write Protect
This Option Bit provides Flash Program Memory protection:
0 = Programming and erasure disabled for all of Flash Program Memory. Programming,
Page Erase, and Mass Erase through User Code is disabled. Mass Erase is available using
the On-Chip Debugger.
1 = Programming, Page Erase, and Mass Erase are enabled for all of Flash program
memory.
Reserved—R/W must be 1 during writes; 1 when read
XTLDIS—State of Crystal Oscillator at Reset
Reserved
Power Control Register 0
R/W
U
6
R/W
U
5
Program Memory 0001H
XTLDIS
R/W
on page 32).
U
4
R/W
U
3
Z8 Encore! XP
R/W
U
2
Reserved
Product Specification
R/W
U
1
®
Flash Option Bits
F0823 Series
R/W
U
0
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