DS3172 Maxim Integrated, DS3172 Datasheet - Page 65

• Manufacturer Part Number: DS3172
• Description: Network Controller & Processor ICs Dual DS3/E3 Single Chip Transceiver
• Manufacturer: Maxim Integrated

Specifications of DS3172

• Part # Aliases: 90-31720-000

Table 10-12. Global 8 kHz Reference Source Table
GL.CR2.
G8KIS
Table 10-13
Table 10-13. Port 8 kHz Reference Source Table
PORT.CR3.P8KRS[1:0]
The 8 kHz reference logic tree is shown below.
Figure 10-7. 8KREF Logic
0
0
0
0
0
0
0
0
1
FRAME MODE
GL.CR2.
G8KRS[2:0]
000
001
010
011
100
101
110
111
XXX
0X
10
11
RX CLOCK
G8KRS[1:0]
FROM CLAD
lists the selectable sources for port 8 kHz reference sources.
TX CLOCK
CC52 CLK
DS3 CLK
P8KRS
E3 CLK
GPIO4
0
1
Source
Undefined
Internal receive framer clock
Internal transmit framer clock
G8KRS[1:0]
Source
is disabled. (Note: CLAD is disabled after reset)
disabled
Derived from CLAD STS-1 clock output or CLKC pin if CLAD
is disabled
None, the 8KHZ divider is disabled.
Derived from CLAD DS3 clock output or CLKA pin if CLAD
Derived from CLAD E3 clock output or CLKB pin if CLAD is
Port 1 8KREF source selected by P8KRS[1:0]
Port 2 8KREF source selected by P8KRS[1:0]
Port 3 8KREF source selected by P8KRS[1:0]
Port 4 8KREF source selected by P8KRS[1:0]
GPIO4 pin
1
2
3
CLOCK DIVIDER
OTHER
8KREF
PORT
CLOCK DIVIDER
0
1
2
3
G8KRS[2]
0
1
65
0
1
G8KREF
GLOBAL 8KREF
PORT 8KREF