CS8900A
Crystal LAN™ ISA Ethernet Controller
PacketPage # of
Address Bytes
Type
Description
Cross Reference
Section 4.5 on page 71,
0144h
0146h
0148h
2
2
8
Write-only TxCMD (transmit command)
Write-only TxLength (transmit length)
Section 5.7 on page 99
Section 4.5 on page 71,
Section 5.7 on page 99
-
Reserved
Note 2
Address Filter Registers
0150h
0158h
015Eh
8
Read/Write Logical Address Filter (hash table)
Section 4.6 on page 72,
Section 5.3 on page 87
6
Read/Write Individual Address
Section 4.6 on page 72,
Section 5.3 on page 87
674
-
Reserved
Note 2
Frame Location
0400h
2
2
-
Read-only RXStatus (receive status)
Read-only RxLength (receive length, in bytes)
Read-only Receive Frame Location
Write-only Transmit Frame Location
Section 4.7 on page 73,
Section 5.2 on page 79
0402h
0404h
0A00
Section 4.7 on page 73,
Section 5.2 on page 79
Section 4.7 on page 73,
Section 5.2 on page 79
-
Section 4.7 on page 73,
Section 5.7 on page 99
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 12. PacketPage Memory Address Map (continued)
CIRRUS LOGIC PRODUCT DATA SHEET
DS271PP3
41
CIRRUS [ CIRRUS LOGIC ]
