W83977ATF Datasheet, PDF (77/207 Pages) Winbond – WINBOND I/O

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