Table 6-6 Dsp Side Registers After Reset - Motorola DSP56309 User Manual

Register Register
Name
HCR All bits
HPCR All bits
HSR HF[1:0]
HTDE
HRDF
HBAR BA[10:3]
HDDR DR[15:0]
HDR D[15:0]
HRX HRX [23:0]
HTX HTX [23:0]
6.5.10 Host Interface DSP Core Interrupts
The HI08 can request interrupt service from either the DSP56309 or the host processor.
The DSP56309 interrupts are internal and do not require the use of an external interrupt
signal. When the appropriate interrupt enable bit in the HCR is set, an interrupt
condition caused by the host processor sets the appropriate bit in the HSR, generating an
interrupt request to the DSP56309. (See Figure 6-11.) The DSP56309 acknowledges
interrupts caused by the host processor by jumping to the appropriate interrupt service
routine. There are three possible interrupts:
¥ Host command
¥ Transmit data register empty
¥ Receive data register full
Although there is a set of vectors reserved for host command use, the host command can
access any interrupt vector in the interrupt vector table. The DSP interrupt service
MOTOROLA

Table 6-6 DSP Side Registers after Reset

HW
Data
Reset
0
0
0
HCP 0
1
0
$80
0
Ñ
empty
empty
DSP56309UM/D
HI08 DSP Side ProgrammerÕs Model
Reset Type
SW IR
Reset Reset
0 bit value
indeterminate
after reset
0 Ñ
0 Ñ
0 0
1 1
0 0
$80 Ñ
0 Ñ
Ñ Ñ
empty empty
empty empty
Host Interface (HI08)
ST
Reset
Ñ
Ñ
Ñ
0
1
0
Ñ
Ñ
Ñ
empty
empty
6-19