Bouffalo Lab BL602, Reference Manual

Page: 140 / 195

BL602/604 Reference Manual
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD RFIU RFIO TFIU TFIO RFI
CLR
TFI
CLR
UDR
EN
UDT
EN
Bits
Name Type Reset Description
31:8 RSVD
7 RFIU R 1’b0 Underflow flag of RX FIFO, can be cleared by rx_fifo_clr
6 RFIO R 1’b0 Overflow flag of RX FIFO, can be cleared by rx_fifo_clr
5 TFIU R 1’b0 Underflow flag of TX FIFO, can be cleared by tx_fifo_clr
4 TFIO R 1’b0 Overflow flag of TX FIFO, can be cleared by tx_fifo_clr
3 RFICLR W1C 1’b0 Clear signal of RX FIFO
2 TFICLR W1C 1’b0 Clear signal of TX FIFO
1 UDREN R/W 1’b0 Enable signal of dma_rx_req/ack interface
0 UDTEN R/W 1’b0 Enable signal of dma_tx_req/ack interface
10.4.15 uart_fifo_config_1
Address
：
0x4000a084
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
RSVD RFITH RSVD TFITH
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RSVD RFICNT RSVD TFICNT
Bits
Name Type Reset Description
31:29 RSVD
28:24 RFITH R/W 5’d0 RX FIFO threshold, dma_rx_req will not be asserted if tx_-
fifo_cnt is less than this value
23:21 RSVD
20:16 TFITH R/W 5’d0 TX FIFO threshold, dma_tx_req will not be asserted if tx_-
fifo_cnt is less than this value
15:14 RSVD
13:8 RFICNT R 6’d0 RX FIFO available count
7:6 RSVD
BL602/604 Reference Manual 140/ 195 @2020 Bouffalo Lab