NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
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Rev 1.00
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Flash Access Time Control Register (FATCON)
Register
Offset
R/W
Description
Reset Value
FATCON
0x18
R/W
Flash Access Time Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
Reserved
FOMSEL1
Reserved
FOMSEL0
Reserved
Bits
Description
[31:7]
Reserved
Reserved.
[6]
FOMSEL1
Chip Frequency Optimization Mode Select1 (Write-protection Bit)
[5]
Reserved
Reserved.
[4]
FOMSEL0
Chip Frequency Optimization Mode Select 0 (Write-Protection Bit)
When CPU frequency is lower than 72 MHz, user can modify flash access delay cycle by
FOMSEL1 and FOMSEL0 to improve system performance.
00 = CPU runs at 50MHz with zero wait cycle for continuous address read access.
01 = CPU runs at 25MHz with zero wait cycle for random address read access.
10 = CPU runs at 50MHz with zero wait cycle for continuous address read access.
11 = CPU runs at 72MHz with one wait cycle for continuous address read access.
Where 00 means FOMSEL1 = 0, FOMSEL0 = 0; 01 means FOMSEL1 = 0, FOMSEL0 = 1
and etc.
[3:0]
Reserved
Reserved.