Datasheet

LMK03000, LMK03000C, LMK03000D, LMK03001
LMK03001C, LMK03001D, LMK03033, LMK03033C
www.ti.com SNAS381O –NOVEMBER 2006–REVISED MARCH 2013
7.2.3 CLKoutX_DIV[7:0] -- Clock Output Dividers
These bits control the clock output divider value. In order for these dividers to be active, the respective
CLKoutX_MUX bit must be set to either "Divided" or "Divided and Delayed" mode. After all the dividers are
programed, the SYNC* pin must be used to ensure that all edges of the clock outputs are aligned. The
Clock Output Dividers follow the VCO Divider so the final clock divide for an output is VCO Divider × Clock
Output Divider. By adding the divider block to the output path a fixed delay of approximately 100 ps is
incurred.
The actual Clock Output Divide value is twice the binary value programmed as listed in the table below.
CLKoutX_DIV[7:0] Clock Output Divider value
0 0 0 0 0 0 0 0 Invalid
0 0 0 0 0 0 0 1 2 (default)
0 0 0 0 0 0 1 0 4
0 0 0 0 0 0 1 1 6
0 0 0 0 0 1 0 0 8
0 0 0 0 0 1 0 1 10
. . . . . . . . ...
1 1 1 1 1 1 1 1 510
7.2.4 CLKoutX_DLY[3:0] -- Clock Output Delays
These bits control the delay stages for each clock output. In order for these delays to be active, the
respective CLKoutX_MUX (See Section 7.2.2) bit must be set to either "Delayed" or "Divided and
Delayed" mode. By adding the delay block to the output path a fixed delay of approximately 400 ps is
incurred in addition to the delay shown in the table below.
CLKoutX_DLY[3:0] Delay (ps)
0 0 (default)
1 150
2 300
3 450
4 600
5 750
6 900
7 1050
8 1200
9 1350
10 1500
11 1650
12 1800
13 1950
14 2100
15 2250
7.2.5 CLKoutX_EN bit -- Clock Output Enables
These bits control whether an individual clock output is enabled or not. If the EN_CLKout_Global bit (See
Section 7.7.4) is set to zero or if GOE pin is held low, all CLKoutX_EN bit states will be ignored and all
clock outputs will be disabled.
CLKoutX_EN bit Conditions CLKoutX State
0 EN_CLKout_Global bit = 1 Disabled (default)
GOE pin = High / No Connect
1 Enabled
Copyright © 2006–2013, Texas Instruments Incorporated General Programming Information 23
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