Signals/Connections
Signal Name
Table 1-11. Host Interface (Continued)
State During
Type
Signal Description
Reset
HTRDY
HDBEN
PB20
Input/
Output
Tri-stated
Host Target Ready
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Target Ready signal.
Output
Host Data Bus Enable
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host Data Bus Enable signal.
Input or Output
Port B 20
When the HI32 is configured as GPIO through the DCTR, this signal is
individually programmed through the HI32 DIRH.
This input is 5 V tolerant.
HIRDY
HDBDR
PB21
Input/
Output
Tri-stated
Tri-stated
Tri-stated
Host Initiator Ready
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Initiator Ready signal.
Output
Host Data Bus Direction
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host Data Bus Direction signal.
Input or Output
Port B 21
When the HI32 is configured as GPIO through the DCTR, this signal is
individually programmed through the HI32 DIRH.
This input is 5 V tolerant.
HDEVSEL
HSAK
Input/
Output
Host Device Select
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Device Select signal.
Output
Host Select Acknowledge
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host Select Acknowledge signal.
PB22
Input or Output
Port B 22
When the HI32 is configured as GPIO through the DCTR, this signal is
individually programmed through the HI32 DIRH.
This input is 5 V tolerant.
HLOCK
HBS
Input
Host Lock
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Lock signal.
Input
Host Bus Strobe
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host Bus Strobe Schmitt-trigger signal.
PB23
Input or Output
Port B 23
When the HI32 is configured as GPIO through the DCTR, this signal is
individually programmed through the HI32 DIRH.
This input is 5 V tolerant.
DSP56301 Technical Data, Rev. 10
1-12
Freescale Semiconductor
FREESCALE [ Freescale ]
