Motorola DSP56303 User Manual page 44

Host Interface (HI08)
Signal Name Type
HACK/HACK Input
HRRQ/HRRQ Output
PB15 Input or
Output
Note: 1. The Wait processing state does not affect the signal state.
2-14
Table 2-11. Host Interface (Continued)
State During
1
Reset or Stop
Disconnected Host Acknowledge—When the HI08 is programmed to interface with a
internally single host request host bus and the HI function is selected, this signal
is the Host Acknowledge (HACK) Schmitt-trigger input. The polarity of
the host acknowledge is programmable, but is configured as active-low
(HACK) after reset.
Receive Host Request—When the HI08 is programmed to interface
with a double host request host bus and the HI function is selected, this
signal is the Receive Host Request (HRRQ) output. The polarity of the
host request is programmable, but is configured as active-low (HRRQ)
after reset. The host request may be programmed as a driven or
open-drain output.
Port B 15
When the HI08 is configured as GPIO through the HPCR, this signal is
individually programmed through the HDDR.
This input is 5 V tolerant.
DSP56303 User's Manual
Signal Description