F81866A Datasheet, PDF (180/210 Pages) Feature Integration Technology Inc. – 6 UARTs Super IO With 128 Bytes FIFO and Power

F81866A
7.10.89bit-mode Slave Address Mask Register ⎯ Index F5h
Bit
Name
R/W Reset Default
Description
This byte accompanying with SADDR will determine the given address and
broadcast address in 9-bit mode. The UART will response to both given and
broadcast address.
Following description determines the given address and broadcast address:
3. given address: If bit n of SADEN is “0”, then the corresponding bit of
SADDR is don’t care.
4. broadcast address: If bit n of ORed SADDR and SADEN is “0”, don’t care
7-0
SADEN
R/W LRESET# 00h
that bit. The remaining bit which is “1” is compared to the received
address.
Ex.
SADDR
0101_1100b
SADEN
1111_1001b
Given Address
0101_1xx0b
Broadcast Address
1111_11x1b
7.10.9FIFO Select Register ⎯ Index F6h
Bit
Name
R/W Reset Default
Description
7
TX_DEL_1BIT
R/W LREST#
0 ^{0: TX will start transmit immediately after writing THR.}
1: TX will delay 1 bit time to transmit after writing THR.
0: TX will assert interrupt when THR is empty.
6
TX_INT_MODE R/W LRESET# 0 _{1: TX will assert interrupt when THR and shift register is empty.}
The RX FIFO threshold select.
00: FIFO threshold is set by RXFTHR.
5-4 RXFTHR_MODE R/W LRESET# 0 01: FIFO threshold will be 2X of RXFTHR.
10: FIFO threshold will be 4X of RXFTHR.
11: FIFO threshold will be 8X of RXFTHR.
IRQ_MODE1 and IRQ_MODE0 will select the UART1 interrupt mode if IRQ
sharing is enabled.
00 : Sharing IRQ active low Level mode.
3
IRQ_MODE1
R/W LREST# 0 ^{01 : Sharing IRQ active high edge mode.}
10 : Sharing IRQ active high Level mode.
11 : Reserved.
This bit is effective at IRQ is sharing with the other device (IRQ_SHARE, bit 1).
2
Reserved
-
-
- Reserved.
Select the FIFO depth.
00: 16-byte FIFO.
1-0
FIFO_MODE
R/W LRESET# 00h 01: 32-byte FIFO.
10: 64-byte FIFO.
11: 128-byte FIFO.
7.11 UART2 Device Configuration Registers (LDN CR11)
“-“ Reserved or Tri-State
Register 0x[HEX]
Register Name
30
Device Enable Register
60
Base Address High Register
MSB
--
00
Default Value
----
0000
LSB
-1
10
180
Jan, 2012
V0. 12P