Datasheet

DS26518 8-Port T1/E1/J1 Transceiver
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Table 10-15. Backplane Reference Clock Select
BPREFSEL3 BPREFSEL2 BPREFSEL1 BPREFSEL0 BFREQSEL
REFERENCE CLOCK
SOURCE
0 0 0 0 0 2.048MHz RCLK1
0 0 0 0 1 1.544MHz RCLK1
0 0 0 1 0 2.048MHz RCLK2
0 0 0 1 1 1.544MHz RCLK2
0 0 1 0 0 2.048MHz RCLK3
0 0 1 0 1 1.544MHz RCLK3
0 0 1 1 0 2.048MHz RCLK4
0 0 1 1 1 1.544MHz RCLK4
0 1 0 0 0 2.048MHz RCLK5
0 1 0 0 1 1.544MHz RCLK5
0 1 0 1 0 2.048MHz RCLK6
0 1 0 1 1 1.544MHz RCLK6
0 1 1 0 0 2.048MHz RCLK7
0 1 1 0 1 1.544MHz RCLK7
0 1 1 1 0 2.048MHz RCLK8
0 1 1 1 1 1.544MHz RCLK8
1 0 0 0 0
2.048MHz derived from
MCLK. (REFCLKIO is an
output.)
1 0 0 0 1
1.544MHz derived from
MCLK. (REFCLKIO is an
output.)
1 0 0 1 0
2.048MHz external clock
input at REFCLKIO.
(REFCLKIO is an input.)
1 0 0 1 1
1.544MHz external clock
input at REFCLKIO.
(REFCLKIO is an input.)