M058ZAN Nuvoton Technology Corporation of America, M058ZAN Datasheet - Page 282

• Manufacturer Part Number: M058ZAN
• Description: IC MCU 32BIT 32KB FLASH 33QFN
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro M051™r

Specifications of M058ZAN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 5x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 33-WFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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