Freescale Semiconductor DSP56366 - Manual (Page 44)

PARALLEL HOST INTERFACE (HDI08)
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
2-10 Freescale Semiconductor
HA2 Input GPIO
disconnected
Host Address Input 2 — When the HDI08 is programmed to interface a
non-multiplexed host bus and the HI function is selected, this signal is line 2
of the host address (HA2) input bus.
HA9 Input Host Address 9 — When HDI08 is programmed to interface a multiplexed
host bus and the HI function is selected, this signal is line 9 of the host
address (HA9) input bus.
PB10 Input, Output, or
Disconnected
Port B 10 — When the HDI08 is configured as GPIO, this signal is
individually programmed as input, output, or internally disconnected.
The default state after reset for this signal is GPIO disconnected.
This input is 5 V tolerant.
HRW Input GPIO
disconnected
Host Read/Write — When HDI08 is programmed to interface a
single-data-strobe host bus and the HI function is selected, this signal is the
Host Read/Write (HRW) input.
HRD/
HRD
Input Host Read Data — When HDI08 is programmed to interface 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.
PB11 Input, Output, or
Disconnected
Port B 11 — When the HDI08 is configured as GPIO, this signal is
individually programmed as input, output, or internally disconnected.
The default state after reset for this signal is GPIO disconnected.
This input is 5 V tolerant.
HDS/
HDS
Input GPIO
disconnected
Host Data Strobe — When HDI08 is programmed to interface 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.
HWR/
HWR
Input Host Write Data — When HDI08 is programmed to interface 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.
PB12 Input, output, or
disconnected
Port B 12 — When the HDI08 is configured as GPIO, this signal is
individually programmed as input, output, or internally disconnected.
The default state after reset for this signal is GPIO disconnected.
This input is 5 V tolerant.
Table 2-9 Host Interface (continued)
Signal Name Type
State during
Reset
Signal Description