SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 64
Version 1.1
3.3.9 SWD Pin Control register (SYS0_SWDCTRL)
Address Offset: 0x20
Bit
Name
Description
Attribute
Reset
31:1
Reserved
R
0
0
SWDDIS
SWD pin disable bit.
0: Enable SWD pin. (P3.5 acts as SWDIO pin, P3.6 acts as SWCLK pin)
1: Disable. (P3.5 and P3.6 act as GPIO pins)
R/W
0
3.3.10 Interrupt Vector Table Mapping register (SYS0_IVTM)
Address Offset: 0x24
This register decides whether the ARM interrupt vector table is mapping to Boot ROM, User ROM, or SRAM.
0x0000 0000
0x0001 0000
0x0002 0000
User ROM 1
User ROM 2
Bit
Name
Description
Attribute
Reset
31:16
IVTMKEY[15:0]
IVTM register key.
Read as 0. Behavior of writing to this register is ignored unless
writing 0xA5A5 to IVTMKEY at the same time.
W
0
15:3
Reserved
R
0
2:0
IVTM[2:0]
Interrupt table mapping selection
000: Map to Boot ROM
001: Map to User ROM 1
011: Map to User ROM 2
Other: Reserved
R/W
By BLEN in code
option
3.3.11 Noise Detect Control register (SYS0_NDTCTRL)
Address Offset: 0x28
Bit
Name
Description
Attribute
Reset
31:2
Reserved
R
0
1
NDT5V_IE
NDT0: Disable for VDD 5V interrupt enable bit.
0: Disable.
R/W
0
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