CD2231 Intel Corporation, CD2231 Datasheet - Page 143

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CD2231

Manufacturer Part Number
CD2231
Description
CD2231 Intelligent Two-channel Lan And Wan Communications Controller
Manufacturer
Intel Corporation
Datasheet
8.6.4.5
8.6.4.6
8.6.4.7
Datasheet
Register Name: ARBCNT
Register Description: Receive Buffer ‘A’ Byte Count
Default Value: x’0000
Access: Word Read/Write
Register Name: BRBCNT
Register Description: Receive Buffer ‘B’ Byte Count
Default Value: x’0000
Access: Word Read/Write
Register Name: ARBSTS
Register Description: Receive Buffer ‘A’ Status
Default Value: x’00
Access: Byte Read/Write
Bit 15
Bit 15
Bit 7
Bit 7
Bit 7
Berr
A Buffer Receive Byte Count (ARBCNT)
B Buffer Receive Byte Count (BRBCNT)
These registers contain the number of bytes stored in the external data buffers by the CD2231. The
count is updated after a block of data is moved to memory and the buffer is terminated. As initially
written by the host, the register contains the number of bytes the buffer can hold.
A Receive Buffer Status (ARBSTS)
Bit 14
Bit 14
EOF
Bit 6
Bit 6
Bit 6
Intelligent Two-Channel LAN and WAN Communications Controller — CD2231
Bit 13
Bit 13
EOB
Bit 5
Bit 5
Bit 5
Binary Count Value, 16-bit Count, bits 15:8
Binary Count Value, 16-bit count, bits 15:8
Binary Count Value, 16-bit count, bits 7:0
Binary Count Value, 16-bit count, bits 7:0
Bit 12
Bit 12
Bit 4
Bit 4
Bit 4
0
Bit 11
Bit 11
Bit 3
Bit 3
Bit 3
0
Bit 10
Bit 10
Bit 2
Bit 2
Bit 2
0
Motorola Hex Address: x’4F
Motorola Hex Address: x’4A
Motorola Hex Address: x’48
Bit 1
Bit 9
Bit 1
Bit 9
Bit 1
Intel Hex Address: x’4C
0
Intel Hex Address: x’4A
Intel Hex Address: x’48
2231own
Bit 0
Bit 8
Bit 0
Bit 8
Bit 0
143

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