Z8F082A28100KIT ZILOG [Zilog, Inc.], Z8F082A28100KIT Datasheet - Page 150
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Z8F082A28100KIT
Manufacturer Part Number
Z8F082A28100KIT
Description
Z8 Encore XP-R F08xA Series with eXtended Peripherals
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.Z8F082A28100KIT.pdf
(244 pages)
- Current page: 150 of 244
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PS024705-0405
Caution:
Byte Programming
Page Erase
Mass Erase
sector can no longer be written or erased. After a bit of the Sector Protect Register has
been set, it can not be cleared except by powering down the device.
The Flash Memory is enabled for byte programming after unlocking the Flash Controller
and successfully enabling either Mass Erase or Page Erase. When the Flash Controller is
unlocked and Mass Erase is successfully enabled, all Program Memory locations are
available for byte programming. In contrast, when the Flash Controller is unlocked and
Page Erase is successfully enabled, only the locations of the selected page are available for
byte programming. An erased Flash byte contains all 1’s (
tion can only be used to change bits from 1 to 0. To change a Flash bit (or multiple bits)
from 0 to 1 requires execution of either the Page Erase or Mass Erase commands.
Byte Programming can be accomplished using the On-Chip Debugger's Write Memory
command or eZ8 CPU execution of the LDC or LDCI instructions. Refer to the eZ8 CPU
User Manual (available for download at
LDCI instructions. While the Flash Controller programs the Flash memory, the eZ8 CPU
idles but the system clock and on-chip peripherals continue to operate. To exit program-
ming mode and lock the Flash, write any value to the Flash Control register, except the
Mass Erase or Page Erase commands.
The Flash memory can be erased one page (512 bytes) at a time. Page Erasing the Flash
memory sets all bytes in that page to the value
fies the page to be erased. Only a page residing in an unprotected sector can be erased.
With the Flash Controller unlocked and the active page set, writing the value
Flash Control register initiates the Page Erase operation. While the Flash Controller exe-
cutes the Page Erase operation, the eZ8 CPU idles but the system clock and on-chip
peripherals continue to operate. The eZ8 CPU resumes operation after the Page Erase
operation completes. If the Page Erase operation is performed using the On-Chip Debug-
ger, poll the Flash Status register to determine when the Page Erase operation is complete.
When the Page Erase is complete, the Flash Controller returns to its locked state.
The Flash memory can also be Mass Erased using the Flash Controller, but only by using
the On-Chip Debugger. Mass Erasing the Flash memory sets all bytes to the value
With the Flash Controller unlocked and the Mass Erase successfully enabled, writing the
value
The byte at each address of the Flash memory cannot be programmed (any bits written
to 0) more than twice before an erase cycle occurs.
63H
to the Flash Control register initiates the Mass Erase operation. While the Flash
P R E L I M I N A R Y
www.zilog.com
FFH
. The Flash Page Select register identi-
Z8 Encore! XP
)for a description of the LDC and
FFH
). The programming opera-
Product Specification
®
F08xA Series
Flash Memory
95h
to the
FFH
.
132
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