Logical Device 4 (Serial Port 0) - Intel 6300ESB Datasheet

Table 657. Logical Device 4 (Serial Port 0)
Logical Device
Register
Enable
Default = 00h
I/O Base Address
Default = 00h
Primary Interrupt
Select
Default = 00h
®
Intel 6300ESB I/O Controller Hub
DS
732
Address
Bits[7:1] Reserved, set to '0'.
Bit[0]
30h
1 = Enable the logical device currently selected through
(R/W)
the Logical Device # register.
0 = Logical device currently selected is inactive
Registers 60h (MSB) and 61h (LSB) set the base
address for the device.
NOTE: Decode is on 8 Byte boundaries
®
Intel 6300ESB ICH Comm Decode Ranges
3F8 - 3FF (COM 1)
2F8 - 2FF (COM 2)
60-61h
220 - 227
(R/W)
228 - 22F
238 - 23F
2E8 - 2EF (COM 4)
338 - 33F
3E8 - 3EF (COM 3)
Bits[3:0] select which interrupt level is used for the
primary Interrupt.
00= No interrupt selected
01= IRQ1
02= IRQ2
03= IRQ3
04= IRQ4
05= IRQ5
06= IRQ6
07= IRQ7
08= IRQ8
09= IRQ9
0A= IRQ10
70h
0B= IRQ11
(R/W)
0C= IRQ12
0D= IRQ13
0E= IRQ14
0F= IRQ15
Bits[7:4] Reserved
NOTE: An Interrupt is activated by setting this register
to a non-zero value and setting any combination
of bits 0-3 in the corresponding UART IER and
the OUT2 bit in the MCR
NOTE: Each SIU port must use a dedicated interrupt.
SIU interrupts cannot be shared with each other
or with other devices.
®
Intel 6300ESB ICH—19
Description
November 2007
Order Number: 300641-004US