Z8F082A28100KIT ZILOG [Zilog, Inc.], Z8F082A28100KIT Datasheet - Page 154

• Manufacturer Part Number: Z8F082A28100KIT
• Description: Z8 Encore XP-R F08xA Series with eXtended Peripherals
• Manufacturer: ZILOG [Zilog, Inc.]

BITS
FIELD
RESET
R/W
ADDR
PS024705-0405
Caution:
FFREQ[15:0]
Flash Sector Protect Register
Flash Frequency High and Low Byte Registers
SPROT7
R/W
0
7
Program Memory Address[15:9] = PAGE[6:0]. For the Z8F04xx and Z8F02xx devices,
the upper 4 bits must always be 0. For the Z8F01xx devices, the upper 5 bits must always
to 0.
The Flash Sector Protect register is shared with the Flash Page Select Register. When the
Flash Control Register
address targets the Flash Sector Protect Register. In all other cases, it targets the Flash
Page Select Register.
This register selects one of the 8 available Flash memory sectors to be protected. The reset
state of each Sector Protect bit is an unprotected state. After a sector is protected by setting
its corresponding register bit, it cannot be unprotected (the register bit cannot be cleared)
without powering down the device.
SPROT7-SPROT0—Sector Protection
Each bit corresponds to a 1024 byte Flash sector. For the Z8 Encore! XP
devices all bits are used.
The Flash Frequency High and Low Byte registers combine to form a 16-bit value,
FFREQ, to control timing for Flash program and erase operations. The 16-bit binary Flash
Frequency value must contain the system clock frequency (in KHz) and is calculated using
the following equation:.
Flash programming and erasure is not supported for system clock frequencies below
20KHz or above 20MHz. The Flash Frequency High and Low Byte registers must be
loaded with the correct value to ensure proper operation of the device.
SPROT6
=
R/W
Table 82. Flash Sector Protect Register (FPROT)
6
0
{
FFREQH[7:0],FFREQL[7:0]
SPROT5
R/W
5
0
is written with 73H followed by 5EH, the next write to this
P R E L I M I N A R Y
SPROT4
R/W
0
4
FF9H
SPROT3
R/W
3
0
}
=
System Clock Frequency
-------------------------------------------------------------- -
Z8 Encore! XP
SPROT2
R/W
0
2
Product Specification
1000
SPROT1
R/W
1
0
®
®
F08xA Series
F08xA Series
Flash Memory
SPROT0
R/W
0
0
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