LPC47M112 SMSC Corporation, LPC47M112 Datasheet - Page 79

• Manufacturer Part Number: LPC47M112
• Description: ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE
• Manufacturer: SMSC Corporation

Enhanced Super I/O Controller with LPC Interface
Datasheet
Registers (Ports)
The run-time registers in the MPU-401 Host Interface are shown below in Table 33.
MIDI Data Port
The MIDI Data port exchanges MIDI transmit and MIDI receive data between the MPU-401 UART interface and the
host.
acknowledge byte ‘FEh’ following host writes to the COMMAND port.
The MIDI Data port is full-duplex; i.e., the transmit and receive buffers can be used simultaneously.
An interrupt is generated when either MIDI receive data or a command acknowledge is available to the host in the
MIDI Data register. See Section “Bit 7 – MIDI Receive Buffer Empty” and “Interrupt”
SMSC DS – LPC47M112
The MIDI Data port is read/write (Table 34). The MIDI Data port is also used to return the command
MIDI DATA
STATUS
COMMAND
NAME
TYPE
REGISTER
NAME
R/W
D7
MIDI DATA/COMMAND-ACKNOWLEDGE REGISTER
R/W
MPU-401 I/O Base Address
MPU-401 I/O Base Address + 1
MPU-401 I/O Base Address + 1
D6
Table 33 - MPU-401 Host Interface Registers
R/W
D5
MPU-401 I/O BASE ADDRESS
ADDRESS
Table 34 - MIDI Data Port
R/W
D4
Page 79
R/W
D3
R/W
R
W
R/W
D2
TYPE
R/W
Used for MIDI transmit data,
MIDI receive data, and MPU-401
command acknowledge.
Used to indicate the send/receive
status of the MIDI Data port.
Used for MPU-401 Commands.
D1
DESCRIPTION
R/W
D0
n/a
DEFAULT
Rev. 02/02/2005