PMB2240 Просмотр технического описания (PDF) - Siemens AG

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PMB2240

GSM-Transmitter

Siemens AG 

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The PMB 2240 has five Power down inputs.

PD = Low means that the respective part of the chip is in power down mode.

TXON1:

TXON1 /\ PUPLO2/FP

SLEEP:

PUPLO2/BU:

PUPLO2/FP:

PDBUFRX /\ SLEEP

Modulator, mixer, Bufmi1, Bufmi2

%2 divider

BufRF, prescaler with its input buffer BufPLL

Input buffer BufTX for external IF oscillator-signal

fixed-PLL, (%492; %13; phase detector, charge pump)

BufRX

For normal operation only three modes are used: sleep mode, TX-mode, RX-mode. Depending on the

application some power down-pins can be combined, and others can be fixed to supply rails.

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In application with PMB2405 and GOLD-uC the power down pins of PMB2240 must be connected to

the timing signals of GOLD-uC as follows:

PMB 2240

TXON1

PUPLO2/BU, PUPLO2/FP

SLEEP, PDBUFRX

connected to

connected to

connected to

GOLD-uC

TXON1

PUPLO2

general purpose port pin

The reproduction, transmission or use of this document is not permitted without express written authority. Offenders will be liable for damages. All

rights, including rights created by patent grant or registration of a utility model or design, are reserved.

Siemens AG

10

05.97

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