LSI Logic Confidential
Async Master Status/Time-Out Register
10-17
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
GPIO Value Register
Memory Space Address: 0x6F054
Value
[8:1]
The value field contains a 1-bit value reflecting the state
of the eight GPIO/interrupt pins. The value for GPIO[0] is
stored in the least significant bit of Value, the value for
GPIO[5] is stored in the most significant bit of Value. For
input pins, the value field is read-only value of the
corresponding pin’s current state. For output pins, the
software can write the desired pin state to the corre-
sponding bit.
WRData
0
WRITE Data bit. The value of this bit is written to any
selected bits during GPIO value register writes. Bits to be
written are selected by placing a 1 in each desired
location as the register is written. Any bit positions that
contain a 0 during register writes remain unchanged.
Value is written to selected bits.
10.7 Async Master Status/Time-Out Register
This register at control bus address 0x6F018 specifies the async master
error status and the time-out interval for self-paced master mode cycles.
The time-out interval to receive a M_DTACK or M_WAIT acknowledge is
specified in units of 1024 internal clocks, and has a range of 0 to 255
units. A value of zero disables the time-out.
When a time-out, SD/Secondary bitstream conflict (SD or secondary
bitstream DMA GO bit on and MConfig = 01 or 11) or master range
address with no M_CS pin selected occurs on a SPARC read, the cycle
is aborted and a data access exception trap is induced in the respective
SPARC. When a time-out, SD/Secondary bitstream conflict or master
31
16
Reserved
15
9
8
1
0
Reserved
Value
WRData
Содержание DMN-8600
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