ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 31

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Table 14 Register Description (cont...)
Revision 2.00/January 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
38
39
Addr.
(Hex)
cnfg_T0_output_enable
cnfg_T0_output_
frequencies
Register Name
This register contains several individual configuration fields, as follows:
Bit 7
Bit 6
=1
=0
Bit 5
=1
=0
Bit 4
=1
=0
Bit 3
Bit 2
=1
=0
Bits (1:0) Set to 0.
Notes:
* Defaults frequencies are changed to multiples of E1/T1 if the appropriate bit of the
cnfg_control1 register is set to 1. For details, see Table 10.
** “Disabled” means that the output port holds a static logic value (the port is not Tri-
stated).
This register holds the frequency selections for each output port, as detailed below.*
Bits (7:6) Dig2:
00
01
10
11
Bits (3:2) Unused.
For Dig1/Dig2 the frequency values are shown for SONET/SDH. They are selected via
the SONET/SDH bits in register cnfg_T0_output_enable.
Note:
* The above frequencies are changed to multiples of E1/T1 if the appropriate bit of
the cnfg_control1 register is set to 1. For details, see Table 10.
1544 kHz/2048 kHz (default),
3088 kHz/4096 kHz,
6176 kHz/8192 kHz,
12352 kHz/16384 kHz.
Unused.
SONET mode selected for Dig2,
SDH mode selected for Dig2 (default)
- see register cnfg_T0_output_frequencies,
SONET mode selected for Dig1,
SDH mode selected for Dig1 (default)
- see register cnfg_T0_output_frequencies.
Output port O2 enabled (default),
Output port O2 disabled**
- see register cnfg_T0_output_frequencies.
Set to 0.
Output port O3 enabled (19.44 MHz*) (default),
Output port O3 disabled**.
FINAL
Page 31
Description
Bits (5:4) Dig1:
00
01
10
11
Bits (1:0)O2
00
01
10
11
3088 kHz/4096 kHz,
6176 kHz/8192 kHz,
12352 kHz/16384 kHz
6.48 MHz (default)
25.92 MHz
19.44 MHz
Dig1.
1544 kHz/2048 kHz (default),
ACS8509 SETS
Default Value (Bin)
DATASHEET
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00011111
0000100