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Host Interface (HI08)
HI08 Host Port Signals
6.3
HI08 HOST PORT SIGNALS
The host port signals are documented in Section 2.8ÑHost Interface (HI08). Each host
port signal can be programmed as a host port signal or as a GPIO signal, PB0ÐPB15, as in
Table 6-1 through Table 6-3.
Table 6-1 HI08 Signal Definitions for Various Operational Modes
HI08 Port
Signal
HAD0ÐHAD7
HAS/HA0
HA8/HA1
HA9/HA2
HCS/HA10
HI08 Port
Signal
HRW/HRD
HDS/HWR
HI08 Port
Signal
HREQ/
HTRQ
HACK/
HRRQ
6-6
Multiplexed Address/Data
Bus Mode
HAD0ÐHAD7
HAS/HAS
HA8
HA9
HA10
Table 6-2 HI08 Data Strobe Signals
Single Strobe Bus
HRW
HDS/HDS
Table 6-3 HI08 Host Request Signals
Vector Required
HREQ/HREQ
HACK/HACK
DSP56309UM/D
Non-Multiplexed Bus
Mode
H0ÐH7
HA0
HA1
HA2
HCS/HCS
Dual Strobe Bus
HRD/HRD
HWR/HWR
No Vector Required
HTRQ/HTRQ
HRRQ/HRRQ
GPIO
Mode
PB0ÐPB7
PB8
PB9
PB10
PB13
GPIO Mode
PB11
PB12
GPIO Mode
PB14
PB15
MOTOROLA
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