SPEAR320 datasheet(21/73 Pages) STMICROELECTRONICS

21 / 73 page

SPEAr320

Architecture overview

Doc ID 16755 Rev 5

21/73

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Slave bulk transfer mode

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Ignores CBUS addresses (predessor to I2C that used to share the I2C bus)

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Transmit and receive buffers

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Interrupt or polled-mode operation

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Handles bit and byte waiting at all bus speeds

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Digital filter for the received SDA and SCL lines

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Handles component parameters for configurable software driver support

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Supports APB data bus widths of 8, 16 and 32 bits.

3.18

UARTs

The SPEAr320 has 3 UARTs with different capabilities.

3.18.1

UART0

Main features:

●

Separate 16 x 8 (16 locations deep x 8-bit wide) transmit and 16 x 12 receive FIFOs to

reduce CPU interrupts

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Speed up to 3 Mbps

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Hardware and/or software flow control

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Modem interface signals

3.18.2

UART1

Main features:

●

Separate 16 x 8 (16 location deep x 8-bit wide) transmit and 16x12 receive FIFOs to

reduce CPU interrupts

●

Speed up to 7 Mbps

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Hardware flow control (in Small Printers and Automation Expansion modes only) and/or

software flow control

3.18.3

UART2

Main features:

●

Separate 16x8 (16 location deep x 8-bit wide) transmit and 16x12 receive FIFOs to

reduce CPU interrupts

●

Speed up to 7 Mbps

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Software flow control

3.19

JPEG CODEC

SPEAr320 provides a JPEG CODEC with header processing (JPGC), able to decode (or

encode) image data contained in the SPEAr320 RAM, from the JPEG (or MCU) format to

the MCU (or JPEG) format.

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