M054ZBN Datasheet, PDF (46/68 Pages) List of Unclassifed Manufacturers – 32-BIT MICROCONTROLLER

NuMicro^™ M052/M054BN Data Sheet
Baud rate
System clock = 22.1184MHz
Mode0
Mode1
921600
460800
Not support
A=1
230400
A=4
115200
A=10
A=0,B=11
A=1,B=15
A=2,B=11
A=4,B=15
A=6,B=11
A=10,B=15
A=14,B=11
57600
A=22
A=22,B=15
A=30,B=11
38400
A=34
A=62,B=8
A=46,B=11
A=34,B=15
19200
A=70
A=126,B=8
A=94,B=11
A=70,B=15
9600
A=142
A=254,B=8
A=190,B=11
A=142,B=15
4800
A=286
A=510,B=8
A=382,B=11
A=286,B=15
Mode2
A=22
A=46
A=94
A=190
A=382
A=574
A=1150
A=2302
A=4606
Table 6-4 UART Baud Rate Setting Table
The UART0 and UART1 controllers support auto-flow control function that uses two low-level
signals, /CTS (clear-to-send) and /RTS (request-to-send), to control the flow of data transfer
between the UART and external devices (ex: Modem). When auto-flow is enabled, the UART is
not allowed to receive data until the UART asserts /RTS to external device. When the number of
bytes in the RX FIFO equals the value of RTS_TRI_LEV (UA_FCR [19:16]), the /RTS is de-
asserted. The UART sends data out when UART controller detects /CTS is asserted from external
device. If the valid asserted /CTS is not detected, the UART controller will not send data out.
The UART controllers also provides Serial IrDA (SIR, Serial Infrared) function (User must set
UA_FUN_SEL [1:0] = ‟10‟ to enable IrDA function). The SIR specification defines a short-range
infrared asynchronous serial transmission mode with one start bit, 8 data bits, and 1 stop bit. The
maximum data rate is 115.2 Kbps (half duplex). The IrDA SIR block contains an IrDA SIR
Protocol encoder/decoder. The IrDA SIR protocol is half-duplex only. So it cannot transmit and
receive data at the same time. The IrDA SIR physical layer specifies a minimum 10ms transfer
delay between transmission and reception. This delay feature must be implemented by software.
The alternate function of UART controllers is LIN (Local Interconnect Network) function. The LIN
mode is selected by setting UA_FUN_SEL [1:0] = „01‟. In LIN mode, one start bit and 8-bit data
format with 1-bit stop bit are required in accordance with the LIN standard.
- 46 -
Publication Release Date: Mar. 19, 2012
Revision V1.01