Signals/Connections
Table 2-10. Host Interface (Continued)
Signal Name
HA0
Type
Input
State During
Reset 1, 2
Ignored Input
Signal Description
Host Address Input 0— When the HI08 is programmed to interface with a
non-multiplexed host bus and the HI function is selected, this signal is line 0
of the Host Address bus.
HAS/HAS
PB8
Input
Input or
Output
Host Address Strobe— When the HI08 is programmed to interface with a
multiplexed host bus and the HI function is selected, this signal is the Host
Address Strobe (HAS) Schmitt-trigger input. The polarity of the address
strobe is programmable, but is configured active-low (HAS) following reset.
Port B 8— When the HI08 is configured as GPIO through the HPCR, this
signal is individually programmed through the HDDR.
HA1
Input
Ignored Input
Host Address Input 1— When the HI08 is programmed to interface with a
non-multiplexed host bus and the HI function is selected, this signal is line 1
of the Host Address bus.
HA8
PB9
Input
Input or
Output
Host Address 8— When the HI08 is programmed to interface with a
multiplexed host bus and the HI function is selected, this signal is line 8 of the
Host Address bus.
Port B 9— When the HI08 is configured as GPIO through the HPCR, this
signal is individually programmed through the HDDR.
HA2
Input
Ignored Input
Host Address Input 2— When the HI08 is programmed to interface with a
non-multiplexed host bus and the HI function is selected, this signal is line 2
of the Host Address bus.
HA9
PB10
Input
Input or
Output
Host Address 9— When the HI08 is programmed to interface with a
multiplexed host bus and the HI function is selected, this signal is line 9 of the
Host Address bus.
Port B 10— When the HI08 is configured as GPIO through the HPCR, this
signal is individually programmed through the HDDR.
HRW
Input
Ignored Input
Host Read/Write— When the HI08 is programmed to interface with a
single-data-strobe host bus and the HI function is selected, this signal is the
Host Read/Write input.
HRD/HRD
PB11
Input
Input or
Host Read Data— When the HI08 is programmed to interface with a
double-data-strobe host bus and the HI function is selected, this signal is the
Host Read Data strobe (HRD) Schmitt-trigger input. The polarity of the data
strobe is programmable, but is configured as active-low (HRD) after reset.
Port B 11— When the HI08 is configured as GPIO through the HPCR, this
signal is individually programmed through the HDDR.
Output
DSP56311 User’s Manual, Rev. 2
2-10
Freescale Semiconductor
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