FDC37M607 datasheet(140/182 Pages) SMSC

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Table 61 - Serial Port 1, Logical Device 4 [Logical Device Number = 0x04]

NAME

REG INDEX

DEFINITION

STATE

Serial Port 1

Mode Register

Default = 0x00

on Vcc POR or

Reset_Drv

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.

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.

UART Interrupt Operation Table

Table 62 - Serial Port 2, Logical Device 5 [Logical Device Number = 0x05]

NAME

REG INDEX

DEFINITION

STATE

Serial Port 2

Mode Register

Default = 0x00

on Vcc POR or

Reset_Drv

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[7:2] Reserved, set to zero

FDC37M607 Datasheet(PDF) 140 Page - SMSC Corporation

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