Switch Mode Dependent Initialization; Table 5.3 Switch Mode Dependent Register Initialization - Renesas IDT 89HPES48H12G2 User Manual

IDT Reset and Initialization
Notes
PES48H12G2 User Manual

Switch Mode Dependent Initialization

Switch modes may be subdivided into normal switch modes and test modes. The modes listed below
are normal switch modes. All other switch modes are test modes.
– Single partition
– Single partition with Serial EEPROM initialization
– Multi-partition
– Multi-partition with Serial EEPROM initialization
– Single partition with port 0 selected as the upstream port (port 2 disabled)
– Single partition with port 2 selected as the upstream port (port 0 disabled)
– Single partition with Serial EEPROM initialization and port 0 selected as the upstream port (port
2 disabled)
– Single partition with Serial EEPROM initialization and port 2 selected as the upstream port (port
0 disabled)
This section outlines switch mode specific initialization that occurs at the end of the switch fundamental
reset sequence. Table 5.3 lists the initial value of non-test mode register fields that are dependent on
normal switch modes. The effect of these initial values are described in section Single Partition Mode on
page 5-6 through section Multi-Partition Mode on page 5-7.
Some of the switch modes have an option with and without serial EEPROM initialization. Except for
serial EEPROM initialization, these switch modes are identical. Therefore, Table 5.3 lists only the version
without serial EEPROM initialization.
Register and Field
SWPART[0]CTL.STATE
SWPART[13,12,9:1]CTL.STATE
SWPORT[0]CTL.MODE
SWPORT[2]CTL.MODE
SWPORT[13,12,9:3,1]CTL.MODE

Table 5.3 Switch Mode Dependent Register Initialization

Single Partition Mode
In single partition with port 0 upstream port, the initial values outlined in Table 5.3 result in the following
configuration:
– All switch ports are members of partition zero.
– Port zero is configured as the upstream port of partition zero. All other ports are configured as
downstream ports of partition zero.
– The initial state of partition zero is active. The initial state of all other partitions is disabled.
In this mode, it is not possible to configure partitions other than partition 0.
Switch Mode (SWMODE)
0xC or 0xD
0x0 or 0x1
Multi-
Single
Partition
Partition
SWMODE
0x1 0x0
0x0 0x0
0x2 0x5
0x1 0x5
0x1 0x5
5 - 6
0x8 or 0xA 0x9 or 0xB
Single Single
Partition Partition
with Port 0 with Port 2
Upstream Upstream
Port Port
0x1 0x1
0x0 0x0
0x2 0x0
0x0 0x2
0x1 0x1
April 5, 2013