DSP56011 MOTOROLA [Motorola, Inc], DSP56011 Datasheet - Page 15

• Manufacturer Part Number: DSP56011
• Description: 24-BIT DVD DIGITAL SIGNAL PROCESSOR
• Manufacturer: MOTOROLA [Motorola, Inc]

HOST INTERFACE (HI)
MOTOROLA
H0–H7
PB0–PB7
HOA0–HOA2
PB8–PB10
Signal Name
The HI provides a fast parallel data to 8-bit port, which may be connected directly to
the host bus. The HI supports a variety of standard buses, and can be directly
connected to a number of industry standard microcomputers, microprocessors, DSPs,
and DMA hardware.
Output
Output
Input/
Input/
Input
Type
DSP56011 Technical Data Sheet, Rev. 1
Input
Input
State During
Reset
Preliminary Information
Table 1-6 Host Interface
Host Data Bus (H0–H7)—This data bus transfers data
between the host processor and the DSP56011.
When configured as a Host Interface port, the H0–H7
signals are tri-stated as long as HEN is deasserted. The
signals are inputs unless HR/W is high and HEN is
asserted, in which case H0–H7 become outputs, allowing
the host processor to read the DSP56011 data. H0–H7
become outputs when HACK is asserted during HOREQ
assertion.
Port B GPIO 0–7 (PB0–PB7)—These signals are General
Purpose I/O signals (PB0–PB7) when the Host Interface is
not selected.
After reset, the default state for these signals is GPIO input.
Host Address0–Host Address 2 (HOA0–HOA2)—These
inputs provide the address selection for each Host
Interface register.
Port B GPIO 8–10 (PB8–PB10)—These signals are General
Purpose I/O signals (PB8–PB10) when the Host Interface is
not selected.
After reset, the default state for these signals is GPIO
input.
Signal Description
Signal/Connection Descriptions
Host Interface (HI)
1-9