Output Data Serializer (Ods); Description; Timing; Figure 13.1. Ook Timing Example - Silicon Laboratories Si4010-C2 Manual

Si4010-C2

13. Output Data Serializer (ODS)

13.1. Description

The ODS block is responsible for synchronizing the output data to the required data rate and maintaining a
steady data flow during transmission. The serializer accomplishes the following functions:
Controls the edge rate of the PA on/off transitions.

Schedules PA, DIVIDER, LCOSC on/off power transitions for minimal power consumption.

Controls the serial data rate.

Provides handshake interface and a 1 byte pipeline to allow a software process to maintain steady

dataflow.
Modulates a 7 bit "frequency deviation" bus to the LC oscillator to allow for FSK operation.

Provides test features to force on the power state of the LCOSC, DIVIDER, and PA; recirculating a fixed

pattern; forcing the FSK offset frequency.
The SFR and XREG settings of this block are determined from the desired modulation, data rate, and
encoding method and are automatically set by the ODS API in conjunction with the calculator. Users are
recommended to use the ODS API module functions for setting these registers.

13.2. Timing

P A _ L V L _ N S L I C E [ 4 : 0 ]
L C _ E N A
D I V _ E N A
P A _ E N A
P A _ L V L _ N S L IC E [4 :0 ]
L C _ E N A
D IV _ E N A
P A _ E N A
F S K _ S H IF T [6 :0 ]
( C O
40
L C _ W A R M U P
D I V _ W A R M U P
P A _ W A R M U P

Figure 13.1. OOK Timing Example

f

Figure 13.2. FSK Timing Example

Rev. 1.0
S Y M B O L T I M E
E D G E T I M E
f f O S )