Motorola DSP56305 User Manual page 210

HOST INTERFACE (HI32)
HOST SIDE Programming Model
HTF HTF
1 0
0 1 The three least significant PCI data bytes are
written to the HTXR.
HI32
X
1 0 The three least significant PCI data bytes are
written to the HTXR.
HI32
X
1 1 The three most significant PCI data bytes are
written to the HTXR.
HI32
6-62
Table 6-15 Transmit Data Transfer Format
Host to DSP Data Transfer Format
PCI mode
GDB/MDDB
DRXR
HTXR
HDTFC
PCI bus
GDB/MDDB
DRXR
HTXR
HDTFC
PCI bus
GDB/MDDB
DRXR
HTXR
HDTFC
PCI bus
X
DSP56305 User's Manual
Universal Bus mode
HD15-HD0 is written to the HTXR, right
aligned and zero extended.
$0
HI32
$0
$0
$0
HD15-HD0 are written to the HTXR, right
aligned and sign extended.
S
HI32
S
S
S
HD15-HD0 are written to the HTXR, left
aligned, and zero filled.
$0
HI32
$0
$0
$0
GDB/MDDB
DRXR
HTXR
HDTFC
Host bus
GDB/MDDB
DRXR
HTXR
HDTFC
Host bus
GDB/MDDB
DRXR
HTXR
HDTFC
Host bus
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