w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 77

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

4.2.5 Set0.Reg4 - Handshake Control Register (HCR)
Legacy IR Register:
This register controls the pins of IR used for handshaking with peripherals such as modem, and
controls the diagnostic mode of IR.
Bit 4: When this bit is set to logical 1, the legacy IR enters diagnostic mode by an internal loopback:
Bit 3: The legacy IR interrupt output is enabled by setting this bit to logic 1.
Advanced IR AD_MD2 AD_MD1 AD_MD0 SIR_PLS
Reset Value
Legacy IR
7
0
1
1
1
1
1
1
1
Mode
IRTX is forced to logical 0, and IRRX is isolated from the communication link instead of the
TSR.
¡Ñ
6
1
1
1
1
1
1
Any combination except those used in SET 2~7
B7
0
¡Ñ
0
5
1
1
1
1
1
1
¡Ñ
4
0
0
0
1
1
1
B6
0
1
SSR Bits
¡Ñ
3
0
0
1
1
0
0
B5
0
1
¡Ñ
2
0
1
0
1
0
1
XLOOP
- 58 -
B4
0
¡Ñ
1
0
0
0
0
0
0
EN_IRQ
TX_WT
B3
0
¡Ñ
0
0
0
0
0
0
0
Publication Release Date:April 1998
EN_DMA
Value
0xEC
0xE0
0xE4
0xE8
0xF0
0xF4
Hex
¡Ð
¡Ð
B2
0
0
W83977ATF
PRELIMINARY
Selected
Set 0
Set 2
Set 3
Set 4
Set 5
Set 6
Set 7
Set1
Set
B1
0
0
0
Revision 0.52
B0
0
0
0