Analog Devices ADuCM356 User Manual

Reference Manual ADuCM356
REGISTER DETAILS: UART
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Table 330. Bit Descriptions for COMFCR (Continued)
Bits Bit Name Settings Description Reset Access
3 FDMAMD FIFO DMA Mode. 0x0 R/W
0 Receive DMA request is asserted when there is data in RBR in the COMRX register or the receive FIFO,
and deasserts when RBR or the receive FIFO is empty. A transmit DMA request is asserted when THR in
the COMTX register or the transmit FIFO is empty, and deasserts whenever data is written to the COMTX
register.
1 Receive DMA request is asserted when the receive FIFO trigger level or timeout is reached, and deasserts
when the receive FIFO is empty. The transmit DMA request is asserted when the transmit FIFO is empty
and deasserts when the transmit FIFO is completely full.
2 TFCLR Clear Transmit FIFO. 0x0 W
0 No effect.
1 Clear transmit FIFO.
1 RFCLR Clear Receive FIFO. 0x0 W
0 No effect.
1 Clear receive FIFO.
0 FIFOEN FIFO Enabled to Work in 16550 UART Mode. 0x0 R/W
FRACTIONAL BAUD RATE REGISTER
Address: 0x40005024, Reset: 0x0000, Name: COMFBR
Table 331. Bit Descriptions for COMFBR
Bits Bit Name Settings Description Reset Access
15 FBEN Fractional Baud Rate Generator Enable. The generating of fractional baud rate and the final baud rate of
UART operation are calculated using the following:
0x0 R/W
Baud Rate = ((UCLK)/(2 × (M + N/2048)) 16 × COMDIV)
[14:13] Reserved Reserved. 0x0 R
[12:11] DIVM Fractional Baud Rate M Divide Bits, 1 to 3. This bit must not be 0. 0x0 R/W
[10:0] DIVN Fractional Baud Rate N Divide Bits, 0 to 2047. 0x0 R/W
BAUD RATE DIVIDER REGISTER
Address: 0x40005028, Reset: 0x0000, Name: COMDIV
Table 332. Bit Descriptions for COMDIV
Bits Bit Name Settings Description Reset Access
[15:0] DIV Baud Rate Divider. Ensure that the COMDIV register is not 0. The range of allowed DIV values is from 1 to
65,535.
0x1 R/W
SECOND LINE CONTROL REGISTER
Address: 0x4000502C, Reset: 0x0002, Name: COMLCR2
Table 333. Bit Descriptions for COMLCR2
Bits Bit Name Settings Description Reset Access
[15:2] Reserved Reserved. 0x0 R
[1:0] OSR Over Sample Rate. 0x2 R/W
00 Over sample by 4.
01 Over sample by 8.
10 Over sample by 16.
11 Over sample by 32.

Analog Devices ADuCM356 Specifications

General

Brand	Analog Devices
Model	ADuCM356
Category	Microcontrollers
Language	English