NUC100LC1BN Nuvoton Technology Corporation of America, NUC100LC1BN Datasheet - Page 381

• Manufacturer Part Number: NUC100LC1BN
• Description: IC MCU 32BIT 32KB FLASH 48LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro™r

Specifications of NUC100LC1BN

• Core Processor: ARM Cortex-M0
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, I²S, LVD, POR, PS2, PWM, WDT
• Number Of I /o: 35
• 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 8x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

5.12 UART Interface Controller (UART)
5.12.1 Overview
NuMicro™ NUC100 Medium Density provides up to three channels of Universal Asynchronous
Receiver/Transmitters (UART). UART0 supports High Speed UART and UART1~2 perform
Normal Speed UART, besides, only UART0 and UART1 support flow control function. NuMicro™
NUC100 Low Density only supports UART0 and UART1.
The Universal Asynchronous Receiver/Transmitter (UART) performs a serial-to-parallel
conversion on data received from the peripheral, and a parallel-to-serial conversion on data
transmitted from the CPU. The UART controller also supports IrDA SIR Function, LIN
master/slave mode function and RS-485 mode functions. Each UART channel supports seven
types of interrupts including transmitter FIFO empty interrupt (INT_THRE), receiver threshold
level reaching interrupt (INT_RDA), line status interrupt (parity error or framing error or break
interrupt) (INT_RLS), receiver buffer time out interrupt (INT_TOUT), MODEM/Wakeup status
interrupt (INT_MODEM), Buffer error interrupt (INT_BUF_ERR) and LIN receiver break field
detected interrupt (INT_LIN_RX_BREAK). Interrupts of UART0 and UART2 share the interrupt
number 12 (vector number is 28); Interrupt number 13 (vector number is 29) only supports
UART1 interrupt. Refer to Nested Vectored Interrupt Controller chapter for System Interrupt Map.
The UART0 is built-in with a 64-byte transmitter FIFO (TX_FIFO) and a 64-byte receiver FIFO
(RX_FIFO) that reduces the number of interrupts presented to the CPU and the UART1~2 are
equipped 16-byte transmitter FIFO (TX_FIFO) and 16-byte receiver FIFO (RX_FIFO). The CPU
can read the status of the UART at any time during the operation. The reported status information
includes the type and condition of the transfer operations being performed by the UART, as well
as 4 error conditions (parity error, framing error, break interrupt and buffer error) probably occur
while receiving data. The UART includes a programmable baud rate generator that is capable of
dividing clock input by divisors to produce the serial clock that transmitter and receiver need. The
baud rate equation is Baud Rate = UART_CLK / M * [BRD + 2], where M and BRD are defined in
Baud Rate Divider Register (UA_BAUD). Table 5-8 lists the equations in the various conditions
and Table 5-9 list the UART baud rate setting table.
Mode
Baud rate
0
1
2
921600
460800
DIV_X_EN
NuMicro™ NUC100 Series Technical Reference Manual
0
1
1
Parameter
A=1
x
DIV_X_ONE
Mode0
0x0000_0001
Table 5-8 UART Baud Rate Equation
0
0
1
Register
x
System clock = 22.1184MHz
Don’t care
Divider X
Parameter
A=0,B=11
A=1,B=15
A=2,B=11
B
B
- 381 -
Mode1
BRD Baud rate equation
A
A
A
0x2B00_0000
0x2B00_0002
0x2F00_0001
Register
UART_CLK / [16 * (A+2)]
UART_CLK / [(B+1) * (A+2)] , B must >= 8
UART_CLK / (A+2), A must >=3
Publication Release Date: Oct 22, 2010
Parameter
A=22
A=46
Mode2
0x3000_002E
0x3000_0016
Register
Revision V1.06