DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 34

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Signals/Connections
2-10
H[0–7]
HAD[0–7]
PB[0–7]
HA0
HAS
PB8
HA1
HA8
PB9
Signal Name
/HAS
Input/Output
Input/Output
Input or
Input or
Input or
Output
Output
Output
Type
Input
Input
Input
Input
State During
Ignored input
Ignored input
Ignored input
Reset
1,2
Table 2-11. Host Interface
DSP56303 User’s Manual, Rev. 2
Host Data
When the HI08 is programmed to interface with a non-multiplexed host
bus and the HI function is selected, these signals are lines 0–7 of the Data
bus.
Host Address
When the HI08 is programmed to interface with a multiplexed host bus
and the HI function is selected, these signals are lines 0–7 of the
Address/Data bus.
Port B 0–7
When the HI08 is configured as GPIO through the HPCR, these signals
are individually programmed through the HI08 Data Direction Register
(HDDR). This input is 5 V tolerant.
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.
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 (
Port B 8
When the HI08 is configured as GPIO through the HPCR, this signal is
individually programmed through the HDDR. This input is 5 V tolerant.
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.
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. This input is 5 V tolerant.
Signal Description
HAS
Freescale Semiconductor
) following reset.