FDC37B787QF SMSC [SMSC Corporation], FDC37B787QF Datasheet - Page 186
FDC37B787QF
Manufacturer Part Number
FDC37B787QF
Description
Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.FDC37B787QF.pdf
(249 pages)
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Serial Port 1, Logical Device 4
Note 1: To properly share and IRQ,
1. Configure UART1 (or UART2) to use the desired IRQ pin.
2. Configure UART2 (or UART1) to use No IRQ selected.
3. Set the share IRQ bit.
Note: If both UARTs are configured to use different IRQ pins and the share IRQ bit is set, then both of
the UART IRQ pins will assert when either UART generates an interrupt.
TABLE 78 - SERIAL PORT 1, LOGICAL DEVICE 4 [LOGICAL DEVICE NUMBER = 0X04]
Serial Port 1
Mode Register
Default = 0x00
on Vcc POR or
Reset_Drv
NAME
REG INDEX
0xF0 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[6:2] Reserved, set to zero
Bit[7]: Share IRQ
=0 UARTS use different IRQs
=1 UARTS share a common IRQ
See Note 1 below.
189
DEFINITION
STATE
C
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