4.6
APB system registers
The IOFPGA contains the APB system registers.
This section contains the following subsections:
•
4.6.1 APB system register summary
•
•
•
•
•
•
•
•
•
•
•
•
4.6.1
APB system register summary
The base memory address of the APB system registers in the IOFPGA is
0x1C01_0000
.
The following table shows the registers in address offset order from the base memory address.
Table 4-125 N1 SDP APB system register summary
Offset
Name
Type
Reset
Width Description
0x0000
SYS_ID
RO
0xXXXXXXXX
32
See
0x0004
SYS_SW
RO/RW
0xX00000XX
32
See
0x0008
SYS_LED
RO/RW
0x000000XX
32
See
.
0x0024
SYS_100HZ
RO/RW
0xXXXXXXXX
32
See
.
0x0030
SYS_FLAG
RO
0x00000000
32
See
0x0030
SYS_FLAGSSET
WO
-
32
See
0x0034
SYS_FLAGSCLR
WO
-
32
See
0x0038
SYS_NVFLAGS
RO
0x00000000
32
See
0x0038
SYS_NVFLAGSSET WO
-
32
See
0x003C
SYS_NVFLAGSCLR WO
-
32
See
0x0058
SYS_CFGSW
RO/RW
0x000000XX
32
See
0x005C
SYS_24MHZ
RO
0xXXXXXXXX
32
See
0x0070
SYS_PCIE_CNTL
RW
0x0000000X
32
See
.
0x0074
SYS_PCIE_GBE_L
RO
0xXXXXXXXX
32
See
.
0x0078
SYS_PCIE_GBE_H
RO
0x0000XXXX
32
See
.
4 Programmers model
4.6 APB system registers
101489_0000_02_en
Copyright © 2019, 2020 Arm Limited or its affiliates. All rights
reserved.
4-197
Non-Confidential - Beta