5.3.8 Output Enable/Disable
Clock outputs are disabled by four signals within Si5341/40 and the OEB pin:
• OUTALL_DISABLE_LOW
• SYSINCAL
• OUTx_OE
• LOL
• OEB pin
The following figure shows the logic of how these disable/enables occur.
Enable to Individual
Output Drivers
LOL
SYSINCAL
OUTALL_DISABLE_LOW
OUTX_OE
OEB Pin
OUTX_OE are the individual Output Driver enables as shown in the table below
1 instance of this is used per output driver
Figure 5.4. Output Enable
Table 5.7. Output Enable/Disable Control Registers
Setting Name
Hex Address [Bit Field]
Function
Si5341 Si5340
OUTALL_DISABLE_LOW 0102[0]
0 = Disables all outputs.
1 = All outputs are not disabled by this signal but may be disabled
by other signals or the OEB pin. See figure above.
OUT0_OE
OUT1_OE
OUT2_OE
OUT3_OE
OUT4_OE
OUT5_OE
OUT6_OE
OUT7_OE
OUT8_OE
OUT9_OE
0108[1]
010D[1]
0112[1]
0117[1]
011C[1]
0121[1]
0126[1]
012B[1]
0130[1]
013A[1]
0112[1]
0117[1]
0126[1]
012B[1]
—
—
—
—
—
—
0 = Specific output disabled.
1 = Specific output is not disabled. The OEB pin or other signals
within the device may be causing an output disable. See figure
above.
Si5341, Si5340 Rev D Family Reference Manual • Output Clocks
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
29 Rev. 1.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021 29
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