T2801 Просмотр технического описания (PDF) - Atmel Corporation

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T2801

DECT Single-Chip Transceiver

Atmel Corporation 

5. Serial Programming Bus

The transceiver is programmed by the 3-wire bus (CLOCK, DATA and ENABLE).

After setting enable signal to low condition, on the rising edge of the clock signal, the data is

transferred bit by bit into the shift register, starting with the MSB-bit. After enable returning to

high condition, the programmed information is loaded into the addressed latches, according to

the addressbit condition (last bit). Additional leading bits are ignored and there is no check made

on how many pulses arrived during enable-low condition. During enable low condition, the bus

current is increased to speed up the bus logic.

The programming of the transceiver is separated into two data words. Data word 1 controls

mainly the channel information together with settings, which are closely related with the channel.

Data word 2 holds setup information, which is adjusted during production.

5.1 Data Word 1

MSB

LSB

Data Bits

Add.

bit

D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 A0

RC

SC

MC

VCOs 1 1 GF MCC GFCS

VCODAC CPCS GF 1

5.2 Data Word 2

E10 E9 E8 E7 E6 E5 E4 E3 E2 E1 E0 A0

DEMODDAC

MCCS

TEST

0

18 T2801

4567B–DECT–03/06

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