AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 132

• Manufacturer Part Number: AM79C978
• Description: Single-Chip 1/10 Mbps PCI Home Networking Controller
• Manufacturer: Advanced Micro Devices

15-12
11-0
CSR41: Current Receive Status
Bit
31-16
15-0
CSR42: Current Transmit Byte Count
Bit
31-16
15-12
11-0
132
RES
CRBC
Name
RES
CRST
Name
RES
RES
CXBC
written as zeros.
This field is a copy of the BCNT
field of RMD1 of the current re-
ceive descriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
zeros and read as undefined.
field is a copy of bits 31-16 of
RMD1 of the current receive de-
scriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
zeros and read as undefined.
written as zeros.
This field is a copy of the BCNT
field of TMD1 of the current trans-
mit descriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
Reserved locations. Read and
Current Receive Byte Count.
Description
Reserved locations. Written as
Current Receive Status. This
Description
Reserved locations. Written as
Reserved locations. Read and
Current Transmit Byte Count.
Am79C978
CSR43: Current Transmit Status
Bit
31-16 RES
15-0
CSR44: Next Receive Byte Count
Bit
31-16 RES
15-12 RES
11-0
CSR45: Next Receive Status
Bit
31-16 RES
15-0
CSR46: Transmit Poll Time Counter
Bit
31-16 RES
CXST
NRBC
NRST
Name
Name
Name
Name
Reserved locations. Written as
zeros and read as undefined.
Current Transmit Status. This
field is a copy of bits 31-16 of
TMD1 of the current transmit de-
scriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
Reserved locations. Written as
zeros and read as undefined.
Reserved locations. Read and
written as zeros.
Next Receive Byte Count. This
field is a copy of the BCNT field of
RMD1 of the next receive de-
scriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
Reserved locations. Written as
zeros and read as undefined.
Next Receive Status. This field is
a copy of bits 31-16 of RMD1 of
the next receive descriptor.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or STOP.
Reserved locations. Written as
zeros and read as undefined.
Description
Description
Description
Description