AM79C960KCW Advanced Micro Devices, AM79C960KCW Datasheet - Page 61
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AM79C960KCW
Manufacturer Part Number
AM79C960KCW
Description
PCnetTM-ISA Single-Chip Ethernet Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C960KCW.pdf
(127 pages)
- Current page: 61 of 127
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2
1
0
CSR1: IADR[15:0]
Bit
15-0 IADR [15:0]
CSR2: IADR[23:16]
Bit
15-8
STOP
STRT
Name
Name
RES
INIT
STOP assertion disables the chip
from all external activity. The chip
remains inactive until either
STRT or INIT are set. If STOP,
STRT and INIT are all set to-
gether, STOP will override STRT
and INIT.
STOP is set by writing a “1” or by
RESET. Writing a “0” has no ef-
fect. STOP is cleared by setting
either STRT or INIT.
STRT
PCnet-ISA controller to send and
receive frames, and perform
buffer management operations.
Setting STRT clears the STOP
bit. If STRT and INIT are set to-
gether,
initialization will be performed
first.
STRT is set by writing a “1”. Writ-
ing a “0” has no effect. STRT is
cleared by RESET or by setting
the STOP bit.
INIT
PCnet-ISA controller to begin the
initialization procedure which
reads in the initialization block
from memory. Setting INIT clears
the STOP bit. If STRT and INIT
are set together, PCnet-ISA con-
troller
performed first. INIT is not
cleared when the initialization se-
quence has completed.
INIT is set by writing a “1”. Writing
a “0” has no effect. INIT is cleared
by RESET or by setting the
STOP bit.
Lower address of the Initializa-
tion address register. Bit location
0 must be zero. Whenever this
register is written, CSR16 is up-
dated with CSR1’s contents.
Read/Write
when the STOP bit in CSR0 is
set. Unaffected by RESET.
Reserved locations. Read and
written as zero.
initialization
PCnet-ISA
assertion
assertion
Description
Description
accessible
controller
P R E L I M I N A R Y
will
enables
enables
only
Am79C960
be
7-0 IADR [23:16]
CSR3: Interrupt Masks and Deferral Control
Bit
15
14
13
12
11
10
9
8
7-5
MERRM
BABLM
MISSM
IDONM
RINTM
TINTM
Name
RES
RES
RES
Upper 8 bits of the address of the
Initialization Block. Bit locations
15-8 must be written with zeros.
Whenever this register is written,
CSR17 is updated with CSR2’s
contents.
Read/Write
when the STOP bit in CSR0 is
set. Unaffected by RESET.
Reserved location. Written as
zero and read as undefined.
Babble Mask. If BABLM is set,
the BABL bit in CSR0 will be
masked and will not set INTR flag
in CSR0.
BABLM is cleared by RESET and
is not affected by STOP.
Reserved location. Written as
zero and read as undefined.
Missed Frame Mask. If MISSM is
set, the MISS bit in CSR0 will be
masked and will not set INTR flag
in CSR0.
MISSM is cleared by RESET and
is not affected by STOP.
Memory Error Mask. If MERRM
is set, the MERR bit in CSR0 will
be masked and will not set INTR
flag in CSR0.
MERRM is cleared by RESET
and is not affected by STOP.
Receive
RINTM is set, the RINT bit in
CSR0 will be masked and will not
set INTR flag in CSR0.
RINTM is cleared by RESET and
is not affected by STOP.
Transmit
TINTM is set, the TINT bit in
CSR0 will be masked and will not
set INTR flag in CSR0.
TINTM is cleared by RESET and
is not affected by STOP.
Initialization
IDONM is set, the IDON bit in
CSR0 will be masked and will not
set INTR flag in CSR0.
IDONM is cleared by RESET and
is not affected by STOP.
Reserved locations. Written as
zero and read as undefined.
Description
Interrupt
Interrupt
accessible
Done
Mask.
Mask.
Mask.
AMD
1-403
only
If
If
If
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