User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 492
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• Communication debugging
• PRS can trigger transmissions
• Full DMA support
• PRS RX input
18.3 Functional Description
The UART is functionally equivalent to the USART with the exceptions defined in Table 18.1 (p. 492)
. The register map and register descriptions are equal to those of the USART. See the USART chapter
for detailed information on the operation of the UART.
Table 18.1. UART Limitations
Feature Limitations
Synchronous operation Not available. SYNC, CSMA, CSINV, CPOL and CPHA in USARTn_CTRL, and
MASTEREN in USARTn_STATUS are always 0.
Transmission direction Always LSB first. MSBF in USARTn_CTRL is always 0.
Chip-select Not available. AUTOCS in USARTn_CTRL is always 0.
SmartCard mode Not available. SCMODE in USARTn_CTRL is always 0.
Frame size Limited to 8-9 databits. Other configurations of DATABITS in USARTn_FRAME
are not possible.
IrDA Not available. IREN in USARTn_IRCTRL is always 0.
18.4 Register Description
The register description of the UART is equivalent to the register description of the USART except the
limitations mentioned in Table 18.1 (p. 492) . See the USART chapter for complete information.
18.5 Register Map
The register map of the UART is equivalent to the register map of the USART. See the USART chapter
for complete information.