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PM0063 bảng dữ liệu(PDF) 22 Page - STMicroelectronics

tên linh kiện PM0063
Giải thích chi tiết về linh kiện  STM32F100xx value line Flash programming
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Register descriptions
PM0063
22/30
Doc ID 16211 Rev 2
3
Register descriptions
The Flash registers have to be accessed as 32-bit words. Half-word or byte accesses are
not allowed.
In this section, the following abbreviations are used:
3.1
Flash access control register (FLASH_ACR)
Address offset: 0x00
Reset value: 0x0000 0000
Table 8.
Abbreviations
Abbreviation
Meaning
read/write (rw)
Software can read from and write to these bits.
read-only (r)
Software can only read these bits.
write-only (w)
Software can only write to this bit. Reading the bit returns the reset
value.
read/clear (rc_w0)
Software can read as well as clear this bit by writing ‘0’. Writing ‘1’ has
no effect on the bit value.
read/set (rs)
Software can read as well as set this bit. Writing ‘0’ has no effect on
the bit value.
Reserved (Res.)
Reserved bit, must be kept at reset value.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
HLFCYA
Reserved
rw
Bits 31:4
Reserved, must be kept cleared.
Bit 3 HLFCYA: Flash half cycle access enable
0: Half cycle is disabled
1: Half cycle is enabled
Bits 2:0
Reserved, must be kept cleared.



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