T5743 Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

T5743

UHF ASK/FSK Receiver

Atmel Corporation 

T5743

The RM implies the following characteristics:

• fRM is lower than the lowest feasible frequency of a data signal. By this means, RM

cannot be misinterpreted by the connected microcontroller.

• If the receiver is set back to polling mode via Pin DATA, RM cannot be cancelled by

accident if t1 is applied according to the proposal in the section “Programming the

Configuration Registers”.

By means of that mechanism the receiver cannot lose its register information without

communicating that condition via the reset marker RM.

Figure 32. Generation of the Power-on Reset

VS

POR

tRst

Data_out (DATA) X

V ThReset

1 / fRM

Programming the Configuration Register

Figure 33. Timing of the Register Programming

IC_ACTIVE

t1

t2 t3 t5

t9

t4

t8

t6

t7

Out1 (µC)

Data_out (DATA) X

Serial bi-directional

data line

X

Receiving

mode

Bit 1

("0")

(Start bit)

Bit 2

("1")

(Register-

select)

Programming frame

Bit 14

("0")

(Poll8)

Bit 15

("0")

(Stop bit)

TSleep TStart-up

SleepStart-up

mode mode

27

4569A–RKE–12/02

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