SB16C1058-TQFP128 IK Semicon Co., Ltd, SB16C1058-TQFP128 Datasheet - Page 37

• Manufacturer Part Number: SB16C1058-TQFP128
• Description: Octal-uart Controller With 256-byte Fifo
• Manufacturer: IK Semicon Co., Ltd

7.5 FIFO Control Register (FCR, Page 0)
FCR is used for enabling the FIFOs, clearing the FIFOs, setting transmit/receive FIFO
trigger level, and selecting the DMA modes. Table 12 shows FCR bit settings.
Table 12:
Bit
7:6
5:4
3
2
1
0
Symbol
FCR[7:6]
FCR[5:4]
FCR[3]
FCR[2]
FCR[1]
FCR[0]
FIFO Control Register Description
OCTAL UART WITH 256-BYTE FIFO
Description
RX FIFO Trigger Level Select
Flow Control Upper Threshold Level Select
TX FIFO Trigger Level Select
Flow Control Lower Threshold Level Select
FCR[5:4] can only be modified and enabled when EFR[4] is set.
DMA Mode Select
FIFO enable
TX FIFO Reset
RX FIFO Reset
00 : 8 characters (default)
01 : 16 characters
10 : 56 characters
11 : 60 characters
00 : 8 characters (default)
01 : 16 characters
10 : 56 characters
11 : 60 characters
00 : 8 characters (default)
01 : 16 characters
10 : 32 characters
11 : 56 characters
00 : 0 character (default)
01 : 8 characters
10 : 16 characters
11 : 56 characters
0 : Set DMA mode 0 (default)
1 : Set DMA mode 1
0 : No TX FIFO reset (default)
1 : Reset TX FIFO pointers and TX FIFO level counter logic.
0 : No RX FIFO reset (default)
1 : Reset RX FIFO pointers and RX FIFO level counter logic.
0 : Disable the TX and RX FIFO (default).
1 : Enable the TX and RX FIFO
This bit will return to ‘0’ after resetting FIFO.
This bit will return to ‘0’ after resetting FIFO.
IN16C1058
JUNE 2009
REV 1.0
37