Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.6.1 APB system register summary
The following table shows the bit assignments.
Table 4-131 SYS_24MHZ Register bit assignments
Bits
Name
Type
Function
[31:0]
24MHZ_COUNT
RO
Contains the count, at 24MHz, from the last
CB_nRST
reset.
CB_nRST
sets the register to zero and then
the count resumes.
4.6.9
SYS_PCIE_CNTL Register
The SYS_PCIE_CNTL Register characteristics are:
Purpose
Error signal from PCIe switch and reset signal to PCIe Express slots.
Usage constraints
There are no usage constraints.
Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.6.1 APB system register summary
The following table shows the bit assignments.
Table 4-132 SYS_PCIE_CNTL Register bit assignments
Bits
Name
Type
Function
[31:2]
-
-
Reserved.
[1]
PCIE_RSTHALT
RW
Error signal from PCIe switch.
[0]
PCIE_nPERST
RW
Reset signal to PCIe expansion slots.
4.6.10
SYS_PCIE_GBE Register
The SYS_PCIE_GBE Register characteristics are:
Purpose
Contains the 48
‑
bit PCI Express Ethernet MAC address.
Usage constraints
Bits[47:0] are read
‑
only.
Configurations
Available in all N1 board configurations.
Memory offset and full register reset value
See
4.6.1 APB system register summary
4 Programmers model
4.6 APB system registers
101489_0000_02_en
Copyright © 2019, 2020 Arm Limited or its affiliates. All rights
reserved.
4-202
Non-Confidential - Beta