High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08)
168
SMSC LAN9312
DATASHEET
14.2
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 addressable by the Host via the Host Bus Interface (HBI).
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 9 sub-categories. Each of these sub-categories contains the
System CSR descriptions of the associated registers. The register descriptions are categorized as
follows:
Section 14.2.1, "Interrupts," on page 172
Section 14.2.2, "Host MAC & FIFO’s," on page 180
Section 14.2.3, "GPIO/LED," on page 192
Section 14.2.4, "EEPROM," on page 197
Section 14.2.5, "IEEE 1588," on page 201
Section 14.2.6, "Switch Fabric," on page 229
Section 14.2.7, "PHY Management Interface (PMI)," on page 243
Section 14.2.8, "Virtual PHY," on page 245
Section 14.2.9, "Miscellaneous," on page 259
Table 14.1 System Control and Status Registers
ADDRESS
OFFSET
SYMBOL
REGISTER NAME
050h
ID_REV
Chip ID and Revision Register,
054h
IRQ_CFG
Interrupt Configuration Register,
058h
INT_STS
Interrupt Status Register,
05Ch
INT_EN
Interrupt Enable Register,
060h
RESERVED
Reserved for Future Use
064h
BYTE_TEST
Byte Order Test Register,
068h
FIFO_INT
FIFO Level Interrupts Register,
06Ch
RX_CFG
Receive Configuration Register,
070h
TX_CFG
Transmit Configuration Register,
074h
HW_CFG
Hardware Configuration Register,
078h
RX_DP_CTRL
RX Datapath Control Register,
07Ch
RX_FIFO_INF
Receive FIFO Information Register,
080h
TX_FIFO_INF
Transmit FIFO Information Register,
084h
PMT_CTRL
Power Management Control Register,
088h
RESERVED
Reserved for Future Use
08Ch
GPT_CFG
General Purpose Timer Configuration Register,
090h
GPT_CNT
General Purpose Timer Count Register,
094h - 098h
RESERVED
Reserved for Future Use