RH-53/54 is a hand-portable dualband GSM/GPRS 900/1800MHz fold-phone, having the DCT4 generation baseband (UEM/UPP) and RF (MJOELNER) circuitry. The RH-53 platform also supports a GSM 850/1900 US variant called RH-54. RH-53 platform is based on common baseband engine 4.0. ■...
The baseband supports both internal and external microphone inputs and speaker outputs. RH-53/54 has two external serial control interfaces: FBUS and MBUS. These busses can be accessed through production test pattern as described in section 8. RH-53/54 transceiver modules are implemented on 8 layers and the surface are with selective Ni/Au OSP.
RH-53/54 Nokia Customer Care 8-System Module Technical Specifications ■ Modes of Operation RH-53/54 baseband engine has six different ‘normal’ operating modes: • Νo supply • Power off • Αcting dead • Active • Sleep • Charging No supply In this mode the phone has no supply voltage.
Functional Description Audio External RH-53/54 is designed to support fully differential external audio accessory connection. A head- set and PnPHF can be directly connected to system connector. Detection of the different ac- cessories is made in analog way by reading the DC voltage value of EAD converter.
MALT Microphone The acoustical design is copied from Nokia 7210 with some modifications. In comparison to N7210, the microphone boot is a separate component placed next to the bottom connector. The electrical Microphone design is a differential bias circuit, driven directly from the MICB1 bias output with external RC-filters.
Pull up NOTES: • Key number “#” is located on GenIO13 with interrupt on GenIOInt1. RH-53 Mar- keting accept the reduction in performance when there is no wake up from deep sleep. • Power on/off and End Call are combined. For ending call: “short” keypress. For power off: “Long”...
(Nokia doc. Code: DHS02040-EN 0.2). Nile display family is using serial interface only ■ Memory Module The RH-53/54 baseband memory module consists of external burst NOR flash memory 8Mbyte (64Mbit) and CMOS 2Mbyte (16Mbit) PSRAM The flash interface follows the common baseband interface.
The SIM card reader is located on upper block part of the phone and is connected to UEM via the flex. For RH-53 a slide-in draw is used as SIM slot. Picture below depicts the SIM slot on the side of the upper block.
Nokia Customer Care Assembly ■ Flex RH-53/54 uses a single layer flex with ground tracks distributed between signal groups, and wide ground tracks running in both sides of the flex to serve as main ground. ISSUE 1 09/2004 COMPANY CONFIDENTIAL...
8-System Module Nokia Customer Care The VCO for the 900/1800 (RH-53) bands covers the range of 3420 to 3840 MHz, while the VCO for 850/1900 (RH-54) (and thereby the quad band) covers 3296 to 3980 MHz. PLL Synthesizer, Functional Description...