Acer D65
? ARM7TDMI core (32/16 bits RISC processor).
? LEAD MEGAMODULE (DSP with 12Kwords of RAM + 68Kwords of ROM
+API + SPI + PLL + TIMER).
? SLICER analog cell.
? STd-cells based Micro controller peripherals.
? ARM ice crusher for test.
? ARM Memory Interface for RAM, Flash or ROM.
? ARM interrupt Handler.
? ARM General purpose I/O for buzzer and keyboard.
? Micro Wire interface for Real time clock, LCD and EEPROM.
? Timers (generics, watchdog, buzzer modulation)
? UART interface for data transfer.
? SIM Interface.
? Arm Peripheral Interface.(APIF)
? GSM Timer. (TPU)
? Timer Serial Port. (TSP)
? ASIC DSP periperal.
? Radio interface.
? OTHER ASIC peripherals.
? Clock generator & control
? Test Macros
? Busgrant macro
? Clicer Power-down
Voiceband Baseband Codec & A/D D/A Interface
The TCM4400 global system for mobile communication (GSM) baseband RF interface circuit
is designed for GSM 900 and DCS 1800 European digital cellular systems (DCS), and PCS
1900 North America personal communications systems (PCS). It includes a complete set of
functions to perform the interface and processing of voice signals, generate baseband in-phase
(I) and quadrature (Q) signals, and control the signals between a digital signal processor
(DSP) and associated RF circuits.
The TCM4400 includes a second serial interface for use with a microcontroller. Through this
interface, a microcontroller can access all the internal registers that can be accessed through
the DSP digital serial interface. This option is for applications in which part of the L1
software is implemented in the microcontroller.
A 4-pin parallel port is dedicated to the full control of the digital audio interface (DAI) to the
GSM system simulator; the DAI consists of system simulator reset (SSRST) control, clock
generation, and rate adaptation with the DSP.
The voice processing portion of the device includes microphone and earphone amplifiers,
analog-to-digital converter (ADC) and digital-to-analog converter (DAC), speech digital
filtering, and a serial port. The baseband processing portion of the device includes a two-
channel uplink path, a two-channel downlink path, a serial port, and a parallel port. The
uplink path performs Gaussian minimum shift keying (GMSK) modulation, D/A conversion,
and has smoothing filters to provide the external RF circuit with I and Q baseband signals.
The downlink path performs antialiasing, analog/digital (A/D) conversion, and channel
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R
Peripherals, Inc. |
ACEC
ACER
