w83877atd Winbond Electronics Corp America, w83877atd Datasheet - Page 58

• Manufacturer Part Number: w83877atd
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

Bit 3 ~0
4.3.2.4 Set0.Reg3 - UART Control Register/Set Select Register (UCR/SSR):
These two registers share the same address. In any Set, Set Select Register (SSR) can be
programmed to desired Set, but UART Control Register can be programmed only in Set 0 and Set 1,
that is, in other Sets programming this register will have no effect. The mapping of entry Set and
programming value is shown as follows.
UART Control Register: Defined legacy UART.
4.3.2.5 Set0.Reg4 - Handshake Control Register (HCR)
Advanced
Reset Value
Legacy
7
0
1
1
1
1
1
1
1
UART
UART
Mode
6
×
Any value but not used in SET 2~7
1
1
1
1
1
1
AD_MD2 AD_MD1 AD_MD0 SIR_PLS
Same Legacy UART mode
TXFTL1, 0
5
×
1
1
1
1
1
1
(Bit 5, 4)
B7
0
0
00
01
10
11
4
×
0
0
0
1
1
1
3
×
0
0
1
1
0
0
SSR Bits
B6
0
0
2
×
0
1
0
1
0
1
TX FIFO Threshold Level
(FIFO Size: 16-byte)
1
×
0
0
0
0
0
0
B5
0
0
0
×
0
0
0
0
0
0
13
1
3
9
XLOOP
Hex Value
- 54 -
B4
0
0xEC
0xE0
0xE4
0xE8
0xF0
0xF4
¡ Ð
¡ Ð
EN_IRQ
TX_WT
B3
0
TX FIFO Threshold Level
(FIFO Size: 32-byte)
Publication Release Date: April 1998
EN_DMA
LP_RI
B2
Selected
0
17
25
Set 0
Set 2
Set 3
Set 4
Set 5
Set 6
Set 7
Set1
1
7
Set
W83877ATF
RTS
RTS
B1
0
Version 0.51
DTR
DTR
B0
0