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SL11R

USB Controller/16-Bit RISC Processor Data Sheet

Cypress Semiconductor 

SL11R

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Figure 3-1. SL11R Block Diagram

3.3 SL11R 16-Bit RISC Processor

The SL11R can be used as a general purpose 16 bit embedded processor. It includes a USB interface (Universal Serial Bus) and

up to 32 bits of GPIO supporting a variety of functions and modes. The 16-bit main data port can be used in either I/O or DMA

bidirectional modes. Also, the SL11R contains 4 PWM channels or four Programmable Time Generator (PTG) signals, a UART,

a 2-wire serial EEPROM interface, an additional External DRAM or SRAM interface for extended memory, two Timers, a Watchdog

Timer, an internal mask BIOS ROM (3kx16) and an SRAM (3Kx8). The SL11R is optimized to offer maximum flexibility in the

implementation of a variety of applications such as: Embedded Digital Video USB controller, USB Scanner controller, USB Cable

Modems, Printers, External Storage Devices, MFU, etc.

The SL11R contains a specialized instruction set (RISC) that is highly optimized to provide efficient coding for a variety of

applications such as video processing algorithms, Network data packet translation and USB transaction processing. The SL11R

includes a simple software interface for all USB transaction processing, which supports Bulk mode (up to 64 Bytes/packet),

Isochronous mode (up to 1024 Bytes/packet), all Interrupt and Control modes.

3.4 3Kx16 Mask ROM and BIOS

The SL11R has a built in 3Kx16 Mask ROM that contains the SL11R BIOS. This BIOS ROM provides the software interface for

the USB and a boot-up option for a 2-wire serial interface or an external 8/16 EEPROM.

3.5 Internal RAM

The SL11R contains 3K x 8 internal RAM. The RAM can be used for code/program, variables, buffer I/O, DMA data (i.e. Video

data), and USB packets. This memory can be accessed by the 16-Bit processor for data manipulation or by the SIE (Serial

Interface Engine), which receives or sends USB host data.

Document #: 38-08006 Rev. **

Page 10 of 85

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