XE1203F データシートの表示（PDF） - Semtech Corporation

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XE1203F

433 MHz / 868 MHz / 915 MHz Low-Power, Integrated UHF Transceiver

Semtech Corporation 

XE1203F

Depending on the ConfigSwitch 1-bit Register or the input level at the SWITCH pin, the XE1203F transceiver will

use either the SWParam configuration set#1 or the set #2. If the RTParam_Switch_ext configuration parameter is

low, then the SWParam configuration set is selected by the ConfigSwitch parameter – set#1 if ConfigSwitch is “0”,

set#2 if ConfigSwitch is “1”. If the RTParam_Switch_ext configuration parameter is high, then the SWParam

configuration set is selected by the SWITCH pin – set#1 if SWITCH is low, set#2 if SWITCH is high.

Table 10 below summarizes the chip configuration programming:

ConfigSwitch

Register

0

1

X

X

SWITCH pin

SWITCH is an output:

‘1’ in transmitter mode

‘0’ in the other modes

SWITCH is an output:

‘1’ in transmitter mode

‘0’ in the other modes

0

1

RTParam_switch_ext

configuration parameter

0

0

1

1

SWParam configuration

set selected

Set #1:

SWParam_mode_1

SWParam_Power_1

SWParam_Rmode_1

SWParam_t_delsig_in_1

SWParam_freq_1

Set #2:

SWParam_mode_2

SWParam_Power_2

SWParam_Rmode_2

SWParam_t_delsig_in_2

SWParam_freq_2

Set #1:

SWParam_mode_1

SWParam_Power_1

SWParam_Rmode_1

SWParam_t_delsig_in_1

SWParam_freq_1

Set #2:

SWParam_mode_2

SWParam_Power_2

SWParam_Rmode_2

SWParam_t_delsig_in_2

SWParam_freq_2

Table 10: ConfigSwitch, SWITCH pin and SWParam Configuration Register

By default the configuration set#1 is used and register RTParam_switch_ext is set to ‘0’.

Note that a new value of the ConfigSwitch register or at the SWITCH pin should be modified when the EN signal is

low. The actual switch to the newly selected set of SWParam register will be applied to the transceiver on the next

rising edge of the EN signal.

© Semtech 2007

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