ds26518 Maxim Integrated Products, Inc., ds26518 Datasheet - Page 125

• Manufacturer Part Number: ds26518
• Description: 8-port T1/e1/j1 Transceiver
• Manufacturer: Maxim Integrated Products, Inc.

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 6: RSYSCLKn Select (RSYSCLKSEL)
Bit 5: TSYSCLKn Select (TSYSCLKSEL)
Bit 4: TCLKn Select (TCLKSEL)
Bits 3 to 0: Clock Out Frequency Select (CLKOSEL[3:0]. CLKO output pin will use MCLK (1.544MHz or
2.048MHz or scaled version) as its reference. The following table shows how to configure for each frequency. For
best jitter performance use a 2.048MHz oscillator for MCLK.
CLKOSEL[3:0]
0 = Use RSYSCLKn pins for each receive system clock (Channels 1–8).
1 = Use BPCLK1 as the master clock for all eight receive system clocks (Channels 1–8).
0 = Use TSYSCLKn pins for each transmit system clock (Channels 1–8).
1 = Use BPCLK1 as the master clock for all eight transmit system clocks (Channels 1–8).
0 = Use TCLKn pins for each of the transmit clock (Channels 1–8).
1 = Use REFCLKIO as the master clock for all eight transmit clocks (Channels 1–8).
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
—
7
0
RSYSCLKSEL
GTCCR3
Global Transceiver Clock Control Register 3
00F4h
6
0
CLKO (kHz)
16384
12352
12288
2048
4096
8192
1544
3088
6176
1536
3072
6144
128
256
32
64
TSYSCLKSEL
5
0
TCLKSEL
125 of 286
4
0
CLKOSEL3
3
0
DS26518 8-Port T1/E1/J1 Transceiver
CLKOSEL2
2
0
CLKOSEL1
1
0
CLKOSEL0
0
0