Reading The Device Status; Reading The User Eeprom - SIGNALCORE SC5506A Operating & Programming Manual

spurs on the RF signal as the serial clock could potentially modulate the internal oscillators. Furthermore,
once the SC5506A stabilizes in temperature, repeated readings will likely differ by as little as 0.25
extended periods of time. Given that the gain-to-temperature coefficient is on the order of less than -0.01
O
dB/ C, gain changes between readings will be negligible.

Reading the Device Status

GET_DEVICE_STATUS (0x18) - This register, summarized in Table 7, returns the device status information
such as phase lock status of the PLL, current reference settings, etc. Data is contained in the first three
bytes.
Table 7. Description of the status data bits.
Bit Description
[23] Channel 1 Auto level enable (Firmware >= rev 4.0 )
[22] Channel 2 Auto level enable (Firmware >= rev 4.0 )
[21] Channel 1 ALC open
[20] Channel 2 ALC open
[19] Channel 1 RF output enable
[18] Channel 2 RF output enable
[17] Channel 1 standby enable
[16] Channel 2 standby enable
[15] Channel 1 sum PLL status
[14] Channel 1 coarse PLL status
[13] Channel 1 fine PLL status
[12] Reserved
[11] Channel 2 sum PLL status
[10] Channel 2 coarse PLL status
[9] Channel 2 fine PLL status
[8] Reserved
[7] VCXO PLL status
[6] TCXO PLL status
[5] External reference detected
[4] Lock to external reference enable
[3] Reference clock output enable
[2] Device accessed

Reading the User EEPROM

USER_EEPROM_READ (0x1A) - Once data has been written to the user EEPROM, it can be retrieved by
calling this register and using the process outlined next for reading calibration data. The maximum address
for this EEPROM is 0x7FFF. A single byte is returned.
SC5506A Operating & Programming Manual Rev 2.1.1
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