ACS8514 Semtech Corporation, ACS8514 Datasheet - Page 47

• Manufacturer Part Number: ACS8514
• Description: Synchronous Equipment Timing Source Partner IC for 2nd T4 Dpll, Accurate Monitoring & Input Extender
• Manufacturer: Semtech Corporation

Revision 3.00 April 2007 © Semtech Corp.
Address(hex): 37
Address(hex): 3B
Register Name
Register Name
Set to 0
ADVANCED COMMS & SENSING
Bit No.
Bit No.
Bit 7
[7:3]
[2:0]
Bit 7
[6:4]
[2:0]
7
3
cnfg_uPsel_pins
Description
Not used.
upsel_pins_value
This register always reflects the value present on the
UPSEL pins of the device. 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, hence it is possible to use
the pins and register combination as a general
purpose input for software.
*The default of this register is entirely dependent on
the value of the pins at reset.
cnfg_int
Description
Set to 0
Not used.
Mon_lim_int
When set to 1 the integral path value of the monitor
DPLL is limited or frozen when the monitor DPLL
reaches either min or max frequency. This can be
used to minimise subsequent overshoot when the
DPLL is pulling in. Note that when this happens, the
reported frequency value via current_DPLL_freq
(registers 0C, 0D &07) is also frozen.
Not used.
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
Page 47
FINAL
(RO) Register reflecting the value
on the UPSEL device pins.
(R/W) Register to freeze integral
path in monitor DPLL
Mon_lim_int
Bit Value
Bit Value
Bit 3
Bit 3
000
001
010
011
100
101
110
111
0
1
0
-
-
-
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.
Value Description
-
-
Monitor DPLL integral value frozen when pulled
to max freq. range
DPLL not frozen
-
ACS8514 SETS Buddy
Bit 2
Bit 2
upsel_pins_value
Default Value
Default Value
Bit 1
Bit 1
DATASHEET
www.semtech.com
0000 0010*
1111 1011
Bit 0
Bit 0