NUTINY-SDK-M0516 Nuvoton Technology Corporation of America, NUTINY-SDK-M0516 Datasheet - Page 282

• Manufacturer Part Number: NUTINY-SDK-M0516
• Description: BOARD EVAL NUMICRO M051 SERIES
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro M051™r
• Type: MCUr

Specifications of NUTINY-SDK-M0516

• Contents: Board, Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: M051™ Series, M052/M054/M058/M0516

RS-485 driver control is implemented using the RTS control signal from an asynchronous serial
port to enable the RS-485 driver. The RTS line is connected to the RS-485 driver enable such
that setting the RTS line to high (logic 1) enables the RS-485 driver. Setting the RTS line to low
(logic 0) puts the driver into the tri-state condition. User can setting LEV_RTS in UA_MCR register
to change the RTS driving level.
Program Sequence example:
1.
2.
3.
4.
5.
Program FUN_SEL in UA_FUN_SEL to select RS-485 function.
Program the RX_DIS bit in UA_FCR register to determine enable or disable RS-485 receiver
Program the RS-485_NMM or RS-485_AAD mode.
If the RS-485_AAD mode is selected, the ADDR_MATCH is programmed for auto address
match value.
Determine auto direction control by programming RS-485_AUD.
NuMicro M051
™
Series Technical Reference Manual
- 282 -
Publication Release Date: Sep 14, 2010
Revision V1.2