Ahb Configuration Register - Ahbcfgr - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230
AHB Configuration Register – AHBCFGR
This register specifies the system clock frequency.
Offset: 0x020
Reset value: 0x0000_0000
31
Type/Reset
23
Type/Reset
15
Type/Reset
7
Type/Reset
Bits Field
[2:0] AHBPRE
Rev. 1.10
30 29 28
22 21 20
14 13 12
6 5 4
Reserved
Descriptions
AHB Pre-scaler
000: CK_AHB = CK_SYS
001: CK_AHB = CK_SYS / 2
010: CK_AHB = CK_SYS / 4
011: CK_AHB = CK_SYS / 8
100: CK_AHB = CK_SYS / 16
101: CK_AHB = CK_SYS / 32
110: CK_AHB = CK_SYS / 32
111: CK_AHB = CK_SYS / 32
Set and reset by software to control the division factor of the AHB clock.
85 of 366
27 26
Reserved
19 18
Reserved
11 10
Reserved
3 2
AHBPRE
RW 0 RW
November 09, 2018
25 24
17 16
9 8
1 0
0 RW 0