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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
366
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497
Rev 1.00
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UART FIFO Control Register (UA_FCR)
Register
Offset
R/W
Description
Reset Value
UA_FCR
x=0,1,2
U0x08
R/W
UART FIFO Control Register
0x0000_0101
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
RTS_TRI_LEV
15
14
13
12
11
10
9
8
Reserved
RX_DIS
7
6
5
4
3
2
1
0
RFITL
Reserved
TFR
RFR
Reserved
Bits
Description
[31:20]
Reserved
Reserved.
[19:16]
RTS_TRI_LEV
RTS Trigger Level For Auto-Flow Control Use (Not Available In UART2 Channel)
0000 = RTS Trigger Level is 1 byte.
0001 = RTS Trigger Level is 4 bytes.
0010 = RTS Trigger Level is 8 bytes.
0011 = RTS Trigger Level is 14 bytes.
0100 = RTS Trigger Level is 30/14 bytes (High Speed/Normal Speed).
0101 = RTS Trigger Level is 46/14 bytes (High Speed/Normal Speed).
0110 = RTS Trigger Level is 62/14 bytes (High Speed/Normal Speed).
Other = Reserved.
Note:
This field is used for RTS auto-flow control.
[15:9]
Reserved
Reserved.
[8]
RX_DIS
Receiver Disable Bit
The receiver is disabled or not (set 1 to disable receiver)
0 = Receiver Enabled.
1 = Receiver Disabled.
Note:
This field is used for RS-485 Normal Multi-drop mode. It should be programmed
before UA_ALT_CSR [RS-485_NMM] is programmed.
[7:4]
RFITL
RX FIFO Interrupt (INT_RDA) Trigger Level
When the number of bytes in the receive FIFO equals the RFITL, the RDA_IF will be set (if
UA_IER [RDA_IEN] enabled, and an interrupt will be generated).
0000 = RX FIFO Interrupt Trigger Level is 1 byte.
0001 = RX FIFO Interrupt Trigger Level is 4 bytes.
0010 = RX FIFO Interrupt Trigger Level is 8 bytes.
0011 = RX FIFO Interrupt Trigger Level is 14 bytes.
0100 = RX FIFO Interrupt Trigger Level is 30/14 bytes (High Speed/Normal Speed).