Cirrus Logic CS8900A - Manual (Page 43)

DS271F5 43
CS8900A
Crystal LAN™ Ethernet Controller
CIRRUS LOGIC PRODUCT DATASHEET
0100h 32 Read/Write Configuration & Control Registers
(2 bytes per register)
Section 4.4 on page 49
0120h 32 Read-only Status & Event Registers
(2 bytes per register)
Section 4.4 on page 49
0140h 4 - Reserved Note 2
Initiate Transmit Registers
0144h 2 Write-only TxCMD (transmit command) Section 4.5 on page 69,
Section 5.6 on page 99
0146h 2 Write-only TxLength (transmit length) Section 4.5 on page 69,
Section 5.6 on page 99
0148h 8 - Reserved Note 2
Address Filter Registers
0150h 8 Read/Write Logical Address Filter (hash table) Section 4.6 on page 71,
Section 5.2.10 on page 87
0158h 6 Read/Write Individual Address Section 4.6 on page 71,
Section 5.2.10 on page 87
015Eh 674 - Reserved Note 2
Frame Location
0400h 2 Read-only RXStatus (receive status) Section 4.7 on page 72,
Section 5.2 on page 78
0402h 2 Read-only RxLength (receive length, in bytes) Section 4.7 on page 72,
Section 5.2 on page 78
0404h - Read-only Receive Frame Location Section 4.7 on page 72,
Section 5.2 on page 78
0A00 - Write-only Transmit Frame Location Section 4.7 on page 72,
Section 5.6 on page 99
PacketPage
Address
# of
Bytes
Type Description Cross Reference
Notes: 1. All registers are accessed as words only.
2. Read operation from the reserved location provides undefined data. Writing to a reserved location or
undefined bits may result in unpredictable operation of the CS8900A.
Table 13. PacketPage Memory Address Map (continued)