z8fmc16100 ZiLOG Semiconductor, z8fmc16100 Datasheet - Page 234

• Manufacturer Part Number: z8fmc16100
• Description: Z8 Encore Motor Control Flash Mcus
• Manufacturer: ZiLOG Semiconductor

Table 122. User Option Bits at Program Memory Address 0000H
BITS
FIELD
RESET
R/W
ADDR
Note: U = Unchanged by Reset. R/W = Read/Write.
PS024611-0408
Caution:
WDT_RES WDT_AO
Trim Option Bits
User Option Bit Configuration By Reset
Option Bit Address Space
Program Memory Address 0000H
R/W
U
7
The trim option bits are contained in the information page of Flash memory. These bits are
factory-programmed values required to optimize the operation of on-board analog circuitry,
and cannot be altered by the user. Program memory can be erased without endangering
these values.
It is possible to alter the working values of these bits by accessing the Trim Bit Address and
Data registers, but these working values are lost after a Reset.
There are 32 trim addresses. To read or write these values, the user code must first write a
value between
register changes the working value of the target trim data. Reading the Trim Bit Data
register returns the working value of the target trim data.
Each time the user option bits are programmed or erased, the device must be Reset for the
change to take place.
The first two bytes of program memory at addresses
(Table
123) are reserved for the user option bits.
R/W
U
6
00h
and
OSC_SEL[1:0]
5
1Fh
R/W
into the Trim Bit Address register. Writing the Trim Bit Data
U
Program Memory 0000H
4
VBO_AO
R/W
U
3
Z8FMC16100 Series Flash MCU
0000h
R/W
RP
U
2
Product Specification
(Table
Reserved
R/W
U
1
122) and
Trim Option Bits
FWP
0001h
R/W
U
0
,
222