SI4010-C2-GS View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

SI4010-C2-GS

CRYSTAL-LESS SOC RF TRANSMITTER

Silicon Laboratories 

Si4010-C2

In assembly:

orl P0,

#00001110B

; Turn GPIO[3:1] as inputs

anl P0CON,

#NOT 00001110B

anl PORT_CTRL, #NOT(M_PORT_MATRIX OR M_PORT_ROFF)

orl PORT_CTRL, #M_PORT_MATRIX ; Set Matrix mode and keep resistors

orl PORT_CTRL, #M_PORT_STROBE ; Strobe new Matrix/Roff modes to GPIO

anl PORT_CTRL, #NOT(M_PORT_STROBE)

30.5. Special GPIO Modes Control

Some of the GPIO serves multiple purposes. Special configuration registers PORT_CTRL and PORT_SET

are used to configure GPIO for other purpose then regular GPIO. Some GPIO can server multiple special

purposes.

Table 30.4 shows all the functionality the GPIO can assume along with control signals and priority of the

functionality. The lower the priority number, the higher the functional priority. For example, if the functional-

ity with priority 1 is programmed, then controls selecting functionality of priority 2 and above will be ignored

no matter what the control settings are.

Rev. 1.0

115

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