LAN9303 Datasheet, PDF (138/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
13.2 System Control and Status Registers
The System CSR’s are directly addressable memory mapped registers with a base address offset
range of 050h to 2DCh. These registers are accessed through the I²C serial interface or the MIIM/SMI
serial interface. For more information on the various modes and their corresponding address
configurations, see Section 2.3, "Modes of Operation," on page 19.
Table 13.2 lists the System CSR’s and their corresponding addresses in order. All system CSR’s are
reset to their default value on the assertion of a chip-level reset.
The System CSR’s can be divided into 7 sub-categories. Each of these sub-categories contains the
System CSR descriptions of the associated registers. The register descriptions are categorized as
follows:
„ Section 13.2.1, "Interrupts," on page 140
„ Section 13.2.2, "GPIO/LED," on page 144
„ Section 13.2.3, "EEPROM," on page 148
„ Section 13.2.4, "Switch Fabric," on page 152
„ Section 13.2.5, "PHY Management Interface (PMI)," on page 167
„ Section 13.2.6, "Virtual PHY," on page 169
„ Section 13.2.7, "Miscellaneous," on page 184
Table 13.2 System Control and Status Registers
ADDRESS
OFFSET
000h - 04Ch
050h
054h
058h
05Ch
060h
064h
068h - 070h
074h
078h - 088h
08Ch
090h
094h - 098h
09Ch
0A0h
0A4h
0A8h
0ACh - 19Ch
SYMBOL
RESERVED
ID_REV
IRQ_CFG
INT_STS
INT_EN
RESERVED
BYTE_TEST
RESERVED
HW_CFG
RESERVED
GPT_CFG
GPT_CNT
RESERVED
FREE_RUN
RESERVED
PMI_DATA
PMI_ACCESS
RESERVED
REGISTER NAME
Reserved for Future Use
Chip ID and Revision Register, Section 13.2.7.1
Interrupt Configuration Register, Section 13.2.1.1
Interrupt Status Register, Section 13.2.1.2
Interrupt Enable Register, Section 13.2.1.3
Reserved for Future Use
Byte Order Test Register, Section 13.2.7.2
Reserved for Future Use
Hardware Configuration Register, Section 13.2.7.3
Reserved for Future Use
General Purpose Timer Configuration Register,
Section 13.2.7.4
General Purpose Timer Count Register, Section 13.2.7.5
Reserved for Future Use
Free Running Counter Register, Section 13.2.7.6
Reserved for Future Use
PHY Management Interface Data Register,
Section 13.2.5.1
PHY Management Interface Access Register,
Section 13.2.5.2
Reserved for Future Use
Revision 1.3 (08-27-09)
138
DATASHEET
SMSC LAN9303/LAN9303i