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Programmable Logic Device:
Clock and Sync Registers
10006609-03
Pm8560
User’s Manual
8-15
OSC2.0:
2.048 MHz Oscillator
0 Disable
1 Enable
MT9045 System Synchronizer Control
The MT9045 provides timing (clock) and synchronization (frame) signals to interface cir-
cuits for T1 and E1 Primary Rate Digital Transmission links. The system synchronizer fre-
quency selects, FS1 and FS2, select which of four possible frequencies (8 kHz, 1.544 MHz,
2.048 MHz, or 19.44 MHz) may be input to the primary and secondary inputs.
Note:
Issue a reset to the MT9045 device whenever any MT9045 control signal is changed.
Register 8-17:
MT4095 System Synchronizer Control (SSCR), 0x48
SSFS2/1:
System Synchronizer Frequency Select 2/1 (read only) bits are inputs to the MT9045 and
indicate what frequency is present on its primary or secondary inputs.
00 19.44 MHz
01 8 kHz
10 1.544 MHz (T1)
11 2.048 MHz (E1)
Note:
FS1 and FS2 read the state of the signals driven by the CPLD to the MT9045 inputs. To change the state of the
FSx pins, write to the RSCR bit 7.
SSLOCK:
System Synchronizer filtered version of LOCK pin (read only)
See
Table 3-2
for the unfiltered version of LOCK.
0 Not locked
1 Locked
SS_PRIEN:
System Synchronizer Primary Enable
0 Disables these buffers when the MT9045 functionality is not used (ensures they are
negated)
1 Enables primary clock source to be driven to the MT9045
SS_SECEN:
System Synchronizer Secondary Enable
0 Disables these buffers when the MT9045 functionality is not used (ensures they are
negated)
1 Enables secondary clock source to be driven to the MT9045
reserved:
Default is 00
7
6
5
4
3
2
1
0
SSFS2
SSFS1
SSLOCK
SS_PRI
EN
SS_SEC
EN
reserved
REFSEL
Summary of Contents for Pm8560
Page 8: ...Contents continued Pm8560 User s Manual 10006609 03 vi ...
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Page 36: ...Setup Troubleshooting Pm8560 User s Manual 10006609 03 2 12 ...
Page 54: ...Serial I O Baud Rate Selection Pm8560 User s Manual 10006609 03 5 4 ...
Page 62: ...TDM Interface Rear Panel I O Connector P14 Pm8560 User s Manual 10006609 03 6 8 ...
Page 72: ...PCI Bus Interface PMC Connector Pin Assignments Pm8560 User s Manual 10006609 03 7 10 ...
Page 112: ...Development Mezzanine Card Troubleshooting Pm8560 User s Manual 10006609 03 10 12 ...
Page 138: ...Monitor Download Formats Pm8560 User s Manual 10006609 03 11 26 ...
Page 144: ...Index continued Pm8560 User s Manual 10006609 03 i 4 ...