SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 302

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

Rev 0.2 (09-28-04)
Serial Port 1
Mode Register
Default = 0x00
on VCC POR,
VTR POR and
PCI RESET
PP Mode Register
Default = 0x3C
on VCC POR,
VTR POR and
PCI RESET
PP Mode Register 2
Default = 0x00
on VCC POR,
VTR POR and
PCI RESET
NAME
NAME
Table 25.12 Serial Port 1, Logical Device 4 [Logical Device Number = 0X04
Table 25.11 Parallel Port, Logical Device 3 [Logical Device Number = 0x03]
REG INDEX
REG INDEX
0xF0 R/W
0xF0 R/W
0xF1 R/W
Bit[0] MIDI Mode
= 0 MIDI support disabled (default)
= 1 MIDI support enabled
Bit[1] High Speed
= 0 High Speed Disabled(default)
= 1 High Speed Enabled
Bit [3:2] Enhanced Frequency Select
= 00 Standard Mode (default)
= 01 Select 921K
= 10 Select 1.5M
= 11 Reserved
Bit[5:4] Reserved, set to zero
Bit[6] All Share IRQ
=0 Use bit 7 to determine sharing
=1 Share all serial ports on the SCH311X device.
SCH3112 - share 2 serial ports
SCH3114 - share 4 serial ports
SCH3116 - share 6 serial ports
Bit[7]: Share IRQ
=0 UARTS 1,2 use different IRQs
=1 UARTS 1,2 share a common IRQ
(Note
Bits[2:0] Parallel Port Mode
= 100 Printer Mode (default)
= 000 Standard and Bi-directional (SPP) Mode
= 001 EPP-1.9 and SPP Mode
= 101 EPP-1.7 and SPP Mode
= 010 ECP Mode
= 011 ECP and EPP-1.9 Mode
= 111 ECP and EPP-1.7 Mode
Bit[6:3] ECP FIFO Threshold
0111b (default)
Bit[7] PP Interrupt Type
Not valid when the parallel port is in the Printer Mode (100) or the
Standard & Bi-directional Mode (000).
= 1 Pulsed Low, released to high-Z.
= 0 IRQ follows nACK when parallel port in EPP Mode or [Printer,
SPP, EPP] under ECP.
IRQ level type when the parallel port is in ECP, TEST, or
Centronics FIFO Mode.
Bit [3:0] Reserved. Set to zero.
Bit [4] TIMEOUT_SELECT
= 0 TMOUT (EPP Status Reg.) cleared on write of ‘1’ to TMOUT.
= 1 TMOUT cleared on trailing edge of read of EPP Status Reg.
Bits[7:5] Reserved. Set to zero.
DATASHEET
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
25.12)
286
DEFINITION
DEFINITION
SMSC SCH311X
Datasheet