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MC-ACT-UARTF データシート(PDF) 4 Page - Actel Corporation

部品番号 MC-ACT-UARTF
部品情報  FastUART
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メーカー  ACTEL [Actel Corporation]
ホームページ  http://www.actel.com
Logo ACTEL - Actel Corporation

MC-ACT-UARTF データシート(HTML) 4 Page - Actel Corporation

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Fast UART
Memec Design
February 25, 2003
4
Optimized for
Accuracy:
The worst case accuracy can be calculated by simply inversing the value n. Therefore, a value larger than 100 will
guarantee accuracy better than 1%, values larger than 1000 produce results better than 0.1%.
Jitter:
The faster the baudrate, the better the accuracy, but more relative jitter is added. Maximum absolute jitter is always
equal 1/fclk.
Serial Interface
The serial interface includes the receive and transmit path separately. It is full a duplex solution, receive and
transmit is possible at the same time.
Transmitter Interface
For transmitting data, a parallel event controlled interface is used. It is an efficient way to embed the MC-ACT-
UARTF in systems as well as connecting simple or complex specific interfaces, including queues etc., to it.
The transmitter path stores the incoming byte in the shift register by means of the fuart_tx_we signal and starts the
transmitting activity. fuart_tx_busy goes high also and remains high until the data is sent.
Receiver Interface
For receiving data, a similar type of interface is used as in the transmitter path
The receiver path contains several checks and special features. First, the level at the fuart_rx_pin is watched. When
a falling edge is detected, the receiver is started. A reception is started only when the start bit after a falling edge is
detected low. If parity is enabled, it is checked and event failures are reported on fuart_par_error. Missing stop bits
(level not zero) are reported as format checks. In all error cases, the data byte is aborted and the error reason is
reported. Please note that fuart_rx_ready is not asserted when error reporting is done.
Device Requirements
Family
Device
Utilization
Performance
COMB
SEQ
Total
SX-A
SX08A-3
274 (54%)
104 (41%)
378 (50%)
142 MHz
ProASIC
PLUS
APA075-STD
n/a
n/a
659 (22%)
70 MHz
Axcelerator
AX500-3
270 (5%)
104 (4%)
374 (5%)
153 MHz
Table 1: Device Utilization and Performance
Verification and Compliance
Complete functional and timing simulation has been performed on the UART-F using ModelSim 5.5d. The UART-F
core has been used successfully in customer designs.


同様の部品番号 - MC-ACT-UARTF

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