SI5338 Datasheet, PDF (55/170 Pages) Silicon Laboratories – I2C-PROGRAMMABLE ANY-FREQUENCY, ANY-OUTPUT QUAD CLOCK GENERATOR

Si5338
Register 27.
Bit
D7
D6
D5
D4
D3
D2
D1
D0
Name I2C_1P8_SEL
I2C_ADDR[6:0]
Type
R/W
R/W*
Reset value = xxxx xxxx
Bit
Name
Function
I²C Reference V_DD.
7
I2C_1P8_SEL ^{External I2C VDD 0 = 3.3 V/2.5 V, 1 = 1.8 V.}
0: 3.3 V/2.5 V (default)
1: 1.8 V
7-Bit I²C Address.
If and only if there is an I2C_LSB pin, the actual I²C LSB address is the logical “or” of
the bit in position 0 with the state of the I2C_LSB pin. Otherwise, the actual I2C_LSB
6:0*
I2C_ADDR[6:0]
is the LSB of this 7-bit address. Custom 7-bit I²C addresses may be requested but
must be even numbers if pin control of the I²C address is to be implemented. For
example, if the I²C address = 70h, the I2C_LSB pin can change the LSB from 0 to 1.
However, if the I²C address = 71h, the I2C_LSB pin will have no effect upon the I²C
address.
*Note: Although these bits are R/W, writing them is not supported. Custom I²C addresses can be set at the factory. Contact
your local sales office for details.
Rev. 0.6
55