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Z8F021ASH020SC 数据表(PDF) 164 Page - Zilog, Inc.

部件名 Z8F021ASH020SC
功能描述  Z8 Encore XP-R 4K Series High-Performance 8-Bit Microcontrollers
PDF  276 Pages
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制造商  ZILOG [Zilog, Inc.]
网页  http://www.zilog.com
标志 ZILOG - Zilog, Inc.

Z8F021ASH020SC 数据表(HTML) 164 Page - Zilog, Inc.

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PS022815-0206
Flash Memory
Z8 Encore! XP® 4K Series
Product Specification
145
Flash Status Register
The Flash Status (FSTAT) register indicates the current state of the Flash Controller. This
register can be read at any time. The read-only Flash Status Register shares its Register
File address with the Write-only Flash Control Register.
Reserved—Must be 0.
FSTAT—Flash Controller Status
000000 = Flash Controller locked.
000001 = First unlock command received (73H written).
000010 = Second unlock command received (8CH written).
000011 = Flash Controller unlocked.
000100 = Sector protect register selected.
001xxx = Program operation in progress.
010xxx = Page erase operation in progress.
100xxx = Mass erase operation in progress
Flash Page Select Register
The Flash Page Select (FPS) register shares address space with the Flash Sector Protect
Register. Unless the Flash controller is unlocked and written with 5EH, writes to this
address target the Flash Page Select Register.
The register is used to select one of the 8 available Flash memory pages to be programmed
or erased. Each Flash Page contains 512 bytes of Flash memory. During a Page Erase
operation, all Flash memory having addresses with the most significant 7-bits given by
FPS[6:0] are chosen for program/erase operation.
Table 82. Flash Status Register (FSTAT)
BITS
7
6
5
4
3
2
1
0
FIELD
Reserved
FSTAT
RESET
0
000
00
00
R/W
R
R
R
RRR
RR
ADDR
FF8H



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