STEVAL-IFW001V1 STMicroelectronics, STEVAL-IFW001V1 Datasheet - Page 33

• Manufacturer Part Number: STEVAL-IFW001V1
• Description: BOARD EVAL BASED ON STR912FA
• Manufacturer: STMicroelectronics

Specifications of STEVAL-IFW001V1

• Design Resources: STEVAL-IFW001V1 Gerber Files STEVAL-IFW001V1 Schematic STEVAL-IFW001V1 Bill of Material
• Main Purpose: Interface, Ethernet
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: E-STE101P, STR912FAW44
• Primary Attributes: Dual Ethernet Transceivers for Full Duplex Communication
• Secondary Attributes: Up to 32 MII Addresses, UART, I2C, SPI, with RJ45 Connectors
• Silicon Manufacturer: ST Micro
• Core Architecture: ARM
• Core Sub-architecture: ARM9
• Silicon Core Number: STR9
• Silicon Family Name: STR91x
• For Use With: 497-8263 - BOARD EXTENSION STEVAL-IFW001V1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8262

STR91xFAxxx
3.20
3.20.1
3.21
UART interfaces with DMA
The STR91xFA supports three independent UART serial interfaces, designated UART0,
UART1, and UART2. Each interface is very similar to the industry-standard 16C550 UART
device. All three UART channels support IrDA encoding/decoding, requiring only an external
LED transceiver to pins UARTx_RX and UARTx_Tx for communication. One UART channel
(UART0) supports full modem control signals.
UART interfaces include the following features:
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For your reference, only two standard 16550 UART features are not supported, 1.5 stop bits
and independent receive clock.
DMA
A programmable DMA channel may be assigned by CPU firmware to service channels
UART0 and UART1 for fast and direct transfers between the UART bus and SRAM with little
CPU involvement. Both DMA single-transfers and DMA burst-transfers are supported for
transmit and receive. Burst transfers require that UART FIFOs are enabled.
I
The STR91xFA supports two independent I2C serial interfaces, designated I2C0, and I2C1.
Each interface allows direct connection to an I2C bus as either a bus master or bus slave
device (firmware configurable). I2C is a two-wire communication channel, having a bi-
directional data signal and a single-directional clock signal based on open-drain line drivers,
requiring external pull-up resistors.
Byte-wide data is transferred between a Master device and a Slave device on two wires.
More than one bus Master is allowed, but only one Master may control the bus at any given
time. Data is not lost when another Master requests the use of a busy bus because I2C
supports collision detection and arbitration. More than one Slave device may be present on
the bus, each having a unique address. The bus Master initiates all data movement and
generates the clock that permits the transfer. Once a transfer is initiated by the Master, any
device that is addressed is considered a Slave. Automatic clock synchronization allows I2C
devices with different bit rates to communicate on the same physical bus.
2
C interfaces
Maximum baud rate of 1.5 Mbps
Separate FIFOs for transmit and receive, each 16 deep, each FIFO can be disabled by
firmware if desired
Programmable FIFO trigger levels between 1/8 and 7/8
Programmable baud rate generator based on CCU master clock, or CCU master clock
divided by two
Programmable serial data lengths of 5, 6, 7, or 8 bits with start bit and 1 or 2 stop bits
Programmable selection of even, odd, or no-parity bit generation and detection
False start-bit detection
Line break generation and detection
Support of IrDA SIR ENDEC functions for data rates of up to 115.2K bps
IrDA bit duration selection of 3/16 or low-power (1.14 to 2.23 µsec)
Channel UART0 supports modem control functions CTS, DCD, DSR, RTS, DTR, and
RI
Doc ID 13495 Rev 6
Functional overview
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