ES1371 Datasheet, PDF (18/37 Pages) List of Unclassifed Manufacturers – ENSONIQ AudioPCI 97 digital controller

ENSONIQ Proprietary Information
7.2. UART
The UART contains three 8 bit registers. The data register can be read or written and is used to receive or
transmit MIDI information. The second register is a 8 bit control register which is write only. The third
register is a 8 bit status register which is read only.
UART Data Register
Addressable as byte only
Power on reset value ??H
Bit(s) R/W Name
7:0 R/W DATA[7:0]
Address 08H
Direct Mapped
Function
The UART data register provides access to MIDI serial data
input/output.
UART Status Register
Addressable as byte only
Power on reset value 00H
Bit(s) R/W Name
15
R RXINT
14:11 R
10
R
ZERO
TXINT
9
R TXRDY
8
R RXRDY
Address 09H
Direct Mapped
Function
This bit is the UART receiver interrupt bit.
0 - No UART receiver interrupt
1 - UART receiver interrupt pending
These bits always read back as zeros to allow for soundscape
detection.
This bit is the UART transmitter interrupt bit
0 - No UART transmitter interrupt
1 - UART transmitter interrupt pending
This bit is the UART transmitter ready bit.
0 - UART transmitter not ready
1 - UART transmitter ready
This bit is the UART receiver ready bit.
0 - UART receiver not ready
1 - UART receiver ready
ENSONIQ Proprietary Information
ENSONIQ AudioPCI 97 Specification Rev 1.1 Oct 1, 1997
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