DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 35

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

Freescale Semiconductor
HA2
HA9
PB10
HRW
HRD
PB11
HDS
HWR
PB12
Signal Name
/HDS
/HRD
/HWR
Input or
Input or
Input or
Output
Output
Output
Type
Input
Input
Input
Input
Input
Input
State During
Ignored input
Ignored input
Ignored input
Table 2-11. Host Interface (Continued)
Reset
1,2
DSP56303 User’s Manual, Rev. 2
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.
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. This input is 5 V tolerant.
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.
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. This input is 5 V tolerant.
Host Data Strobe
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 Data Strobe
(HDS) Schmitt-trigger input. The polarity of the data strobe is
programmable, but is configured as active-low (HDS) following reset.
Host Write 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 Write Data
Strobe (HWR) Schmitt-trigger input. The polarity of the data strobe is
programmable, but is configured as active-low (HWR) following reset.
Port B 12
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
Host Interface (HI08)
2-11