CS8900-CQ3 Cirrus Logic, CS8900-CQ3 Datasheet - Page 40

• Manufacturer Part Number: CS8900-CQ3
• Description: Crystal LAN ISA Ethernet Controller
• Manufacturer: Cirrus Logic

etPage base + 0A00h) are directly accessible. See
Section 4.7 on page 73.
Notes: 1. All registers are accessed as words only.
Bus Interface Registers
Status and Control Registers
Initiate Transmit Registers
PacketPage
40
Address
002Ch
002Ah
0000h
0004h
0020h
0022h
0024h
0026h
0028h
0030h
0034h
0038h
0040h
0042h
0044h
0050h
0052h
0100h
0120h
0140h
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.
Bytes
# of
174
28
12
32
32
4
2
2
2
2
2
2
4
4
4
8
2
2
2
4
Read/Write I/O Base Address
Read/Write Interrupt Number (0,1,2,or 3)
Read/Write DMA Channel Number (0, 1, or 2)
Read/Write Memory Base Address Register
Read/Write Boot PROM Base Address
Read/Write Boot PROM Address Mask
Read/Write EEPROM Command
Read/Write EEPROM Data
Read/Write Configuration & Control Registers
Read-only Product Identification Code
Read-only DMA Start of Frame
Read-only DMA Frame Count (12 Bits)
Read-only RxDMA Byte Count
Read only Received Frame Byte Counter
Read-only Status & Event Registers
Type
-
-
-
-
-
Reserved
(20 Bit)
Reserved
Reserved
Reserved
(2 bytes per regiseter)
(2 bytes per register)
Reserved
Table 12. PacketPage Memory Address Map
CIRRUS LOGIC PRODUCT DATA SHEET
Description
4.2 PacketPage Memory Map
Table 12 shows the CS8900A PacketPage memory
address map: s
Crystal LAN™ ISA Ethernet Controller
Section 4.3 on page 42
Note 2
Section 4.3 on page 42,
Section 4.7 on page 73
Section 3.2 on page 18,
Section 4.3 on page 42
Section 3.2 on page 18,
Section 4.3 on page 42
Section 4.3 on page 42,
Section 5.4 on page 90
Sections Section 4.3 on page 42,
”Receive DMA”
Section 4.3 on page 42,
Section 5.4 on page 90
Section 4.3 on page 42,
Section 4.9 on page 74
Section 3.6 on page 25,
Section 4.3 on page 42
Section 3.6 on page 25,
Section 4.3 on page 42
Note 2
Section 3.5 on page 24,
Section 4.3 on page 42
Section 3.5 on page 24,
Section 4.3 on page 42
Note 2
Section 4.3 on page 42,
Section 5.2.9 on page 87
Note 2
Section 4.4 on page 47
Section 4.4 on page 47
Note 2
Cross Reference
CS8900A
DS271PP3