NXP Semiconductors DSP56853FGE

Overview

DSP56853FGE from NXP (formerly Freescale) is a 16-bit Digital Signal Controller (DSC) integrating a 56800E core, 12K × 16-bit program SRAM, 4K × 16-bit data SRAM, and 1K × 16-bit boot ROM. It delivers 120 MIPS at 120 MHz, supports up to 2M-word external program memory, and features six-channel DMA, dual SCI, SPI, ESSI, and an 8-bit parallel host interface - deployed in telephony, noise suppression, and point-of-sale audio systems.

For engineers reviewing the DSP56853FGE datasheet, DSP56853FGE pinout, DSP56853FGE application, or DSP56853FGE equivalent, key selection considerations include its 128-pin LQFP package, 3.3V I/O compatibility, Harvard architecture with dual MAC capability, and flexible peripheral multiplexing across 41 GPIOs.

Technical Context

The DSP56853FGE implements a dual-Harvard 16-bit 56800E core with three parallel execution units enabling up to six operations per instruction cycle. Its architecture includes four 36-bit accumulators, hardware DO/REP loops, and controller-style addressing modes optimized for both DSP math and real-time control tasks.

Memory subsystem supports simultaneous access to on-chip SRAM/ROM and off-chip memory via glue-less EMI with chip select logic (CS0–CS3), while peripherals-including quad timer, COP/watchdog, TOD clock, and JTAG/Enhanced OnCE-operate under unified system bus control with IPBus bridge integration.

Key Specifications

Pinout & Package

Package: 128-pin LQFP (14 mm × 14 mm, 0.4 mm pitch), RoHS-compliant, with dedicated power/ground pins (6× VDD, 6× VSS, 10× VDDIO, 10× VSSIO, 1× VDDA, 1× VSSA) and thermal pad exposed on underside.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal controller applications.

Compared with DSP56853FGE, DSP56F807FGE offers non-volatile program storage and richer audio interface features but sacrifices boot ROM simplicity; TMS320F28027PTT provides higher analog integration and lower BOM cost for motor control, yet omits the parallel host interface and ESSI essential for legacy audio subsystem integration.

Availability

DSP56853FGE is available at Aetrix Electronics and suitable for telephony audio processing, noise suppression systems, and point-of-sale audio terminals requiring stable component supply across long-lifecycle industrial programs.

Supply support for DSP56853FGE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontrollers and digital signal processing.

The DSP56853FGE belongs to NXP's 56800E-based Digital Signal Controller family, designed specifically for cost-sensitive, real-time embedded applications combining DSP computation and microcontroller peripherals - especially in audio, metering, and appliance control.

FAQ

What is the maximum operating frequency of the DSP56853FGE?

The DSP56853FGE operates at a maximum core frequency of 120 MHz, delivering 120 MIPS performance. This is achieved using an internal PLL driven by an external crystal (XTAL) or oscillator (EXTAL), with clock output (CLKO) available for system synchronization. The DSP56853FGE datasheet specifies timing margins for all peripheral interfaces at this frequency, including external bus cycles and SCI baud rates.

Does the DSP56853FGE include non-volatile program memory?

No, the DSP56853FGE does not include flash or EEPROM for program storage. It integrates 12K × 16-bit program SRAM and 1K × 16-bit boot ROM. The boot ROM contains initialization code and bootstrap loader, while application code must be loaded into SRAM at startup - either from external memory via EMI or through JTAG/OnCE during development. The DSP56853FGE relies on external non-volatile memory for production firmware persistence.

How many general-purpose I/O pins does the DSP56853FGE support?

Up to 41 GPIO pins are available on the DSP56853FGE, distributed across Ports A–H. These pins are function-multiplexed with peripherals including SCI, SPI, ESSI, Host Interface, Quad Timer, and chip selects. Each pin can be individually configured as input or output in GPIO mode after reset, with weak pull-ups enabled by default (except MODE pins and TCK). Pin configuration is controlled via dedicated peripheral enable registers in the DSP56853FGE memory map.

Can the DSP56853FGE interface directly with an external ADC or DAC?

Yes, the DSP56853FGE supports direct interface with external ADCs and DACs via multiple synchronous serial interfaces: the Enhanced Synchronous Serial Interface (ESSI) supports I²S, AC'97, and custom frame-sync protocols; the SPI port handles standard serial converters; and two SCI modules allow UART-based converter control. The ESSI's STD0/SRD0/SCK0/SC00–SC02 pins provide sample-rate flexibility up to 50 MHz, making the DSP56853FGE suitable for 16-bit audio conversion in real-time systems.

Is the DSP56853FGE pin-compatible with other devices in the 56800E family?

No, the DSP56853FGE is not pin-compatible with other 56800E-family members such as the DSP56F807FGE or DSP56F8346. While sharing the same 56800E core architecture and many peripheral blocks, the DSP56853FGE uses a unique 128-pin LQFP pinout optimized for its specific mix of external bus signals, host interface, and ESSI functionality. Pin assignments for address/data buses, chip selects, and peripheral I/O differ significantly across variants - PCB layout must be designed specifically for the DSP56853FGE.