Scsi output data latch (sodl), Scsi output data latch, Sodl) – Avago Technologies LSI53C876E User Manual
Page 189: Scsi output, Data latch (sodl), Scsi bus data lines (sbdl), Scsi, Output data latch (sodl), Scsi output data, Latch (sodl)
SCSI Registers
4-95
Registers: 0x54–0x55
SCSI Output Data Latch (SODL)
Read/Write
SODL
SCSI Output Data Latch
[15:0]
This register is used primarily for diagnostic testing or
programmed I/O operation. Data written to this register is
asserted onto the SCSI data bus by setting the Assert
Data Bus bit in the
register.
This register can send data using programmed I/O. Data
flows through this register when sending data in any
mode. It is also used to write to the synchronous data
FIFO when testing the chip. The power-up value of this
register is indeterminate.
Registers: 0x58–0x59
SCSI Bus Data Lines (SBDL)
Read Only
SBDL
SCSI Bus Data Lines
[15:0]
This register contains the SCSI data bus status. Even
though the SCSI data bus is active low, these bits are
active high. The signal status is not latched and is a true
representation of exactly what is on the data bus at the
time the register is read. This register is used when
receiving data using programmed I/O. This register can
also be used for diagnostic testing or in low level mode.
The power-up value of this register is indeterminate.
15
0
SODL
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
15
0
SBDL
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x