DSP56303 Datasheet, PDF (129/292 Pages) Freescale Semiconductor, Inc – DSP56303 USER’S MANUAL

Programming Model Quick Reference
Table 6-19. HI08 Programming Model, DSP Side (Continued)
Register _Bit
No.
HPCR
4
cont.
5
6
7
8
9
10
11
12
13
14
15
Bit
HREN
HAEN
HEN
—
HROD
HDSP
HASP
HMUX
HDDS
HCSP
HRP
HAP
Bit
Name
Value
Function
Host Request
Enable
HDRQ = 0
HDRQ = 1
0 HREQ/HTRQ = GPIO
HREQ/HTRQ
1 HACK/HRRQ = GPIO
HREQ/HTRQ =
HREQ,HREQ/HTRQ
HACK/HRRQ = HTRQ, HRRQ
Host
Acknowledge
Enable
HDRQ = 0
HDRQ=1
0 HACK/HRRQ = GPIO
HREQ/HTRQ
1 HACK/HRRQ = GPIO
HACK/HRRQ = HACK
HREQ/HTRQ
HACK/HRRQ = HTRQ, HRRQ
Host Enable
0 Host Port = GPIO
1 Host Port Active
Reserved
0 Reserved
Host Request
Open Drain
0 HREQ/HTRQ/HRRQ = driven
1 HREQ/HTRQ/HRRQ = open drain
Host Data Strobe 0 HDS/HRD/HWR active low
Polarity
1 HDS/HRD/HWR active high
Host Address
Strobe Polarity
0 HAS active low
1 HAS active high
Host Multiplexed
Bus
0 Separate address and data lines
1 Multiplexed address/data
Host Dual Data
Strobe
0 Single Data Strobe (HDS)
1 Double Data Strobe (HWR, HRD)
Host Chip Select
Polarity
0 HCS active low
1 HCS active high
Host Request
Polarity
0 HREQ/HTRQ/HRRQ active low
1 HREQ/HTRQ/HRRQ active high
Host
Acknowledge
Polarity
0 HACK active low
1 HACK active high
Reset Type
HW/
SW
0
Indivi-
dual
—
STOP
—
0
—
—
0
—
—
0
—
—
0
0
—
—
0
—
—
0
—
—
0
—
—
0
—
—
0
—
—
0
—
—
Freescale Semiconductor
DSP56303 User’s Manual, Rev. 2
6-29