ACS8530 Semtech Corporation, ACS8530 Datasheet - Page 133
ACS8530
Manufacturer Part Number
ACS8530
Description
Synchronous Equipment Timing Source For Stratum 2/3E/3 Systems
Manufacturer
Semtech Corporation
Datasheet
1.ACS8530.pdf
(150 pages)
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Address (hex):
Revision 3.01/October 2003 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Bit No.
Bit 7
[7:3]
[2:0]
7F
cnfg_uPsel
Description
Not used.
upsel_value
This register defaults to reflecting the value present
on the UPSEL pins of the device at reset. At reset
this is used to set the mode of the microprocessor
interface. Following power-up, these pins have no
further effect on the microprocessor interface.
*In order that the device can be “booted” from an
EPROM and subsequently communicate with a
processor, this register is programmable in EPROM
mode. The value programmed in location 7F of the
EPROM will be the value loaded into this register.
**The default of this register is entirely dependent
on the value of the pins at reset.
Bit 6
Bit 5
Description
Bit 4
FINAL
Page 133
(R/W)* Register reflecting the
value on the UPSEL device pins
following reset, and writeable in
EPROM mode.
(value at reset)
Bit Value
Bit 3
000
001
010
011
100
101
110
111
-
Value Description
-
Not used.
Interface in EPROM boot mode.
Interface in Multiplexed mode.
Interface in Intel mode.
Interface in Motorola mode.
Interface in Serial mode.
Not used.
Not used.
Bit 2
Default Value
ACS8530 SETS
upsel_value
Bit 1
DATASHEET
www.semtech.com
0000 0000**
Bit 0
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