Host Interface (HI32)
Table 1-11. Host Interface (Continued)
State During
Signal Name
Type
Signal Description
Reset
HPAR
Input/
Tri-stated
Host Parity
Output
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Parity signal.
HDAK
Input
Host DMA Acknowledge
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host DMA Acknowledge Schmitt-trigger
signal.
Port B
When the HI32 is configured as GPIO through the DCTR, this signal is
internally disconnected.
This input is 5 V tolerant.
HPERR
HDRQ
Input/
Output
Tri-stated
Host Parity Error
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Parity Error signal.
Output
Host DMA Request
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host DMA Request output.
Port B
When the HI32 is configured as GPIO through the DCTR, this signal is
internally disconnected.
This input is 5 V tolerant.
HGNT
HAEN
Input
Input
Input
Host Bus Grant
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Bus Grant signal.
Host Address Enable
When HI32 is programmed to interface with a universal, non-PCI bus and the
HI function is selected, this is the Host Address Enable output signal.
Port B
When the HI32 is configured as GPIO through the DCTR, this signal is
internally disconnected.
This input is 5 V tolerant.
HREQ
HTA
Output
Output
Tri-stated
Host Bus Request
When the HI32 is programmed to interface with a PCI bus and the HI function
is selected, this is the Host Bus Request signal.
Host Transfer Acknowledge—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. HTA can be programmed as active high or active low.
Port B
When the HI32 is configured as GPIO through the DCTR, this signal is
internally disconnected.
This input is 5 V tolerant.
DSP56301 Technical Data, Rev. 10
Freescale Semiconductor
1-13
FREESCALE [ Freescale ]
