6-20
DSP56305 User’s Manual
MOTOROLA
HOST INTERFACE (HI32)
DSP SIDE Programming Model
6.5.1.14
DCTR Reserved Control Bits 23, 12-7
These bits are reserved for future expansion, they are read as zeros and should be
written with zeros for upward compatibility.
Table 6-5
Host Port Signal Functionality
HI32
Port
Pin
PCI Bus
Mode
Universal Bus Mode
a
a.
When operating with a host bus less than 24 bits wide, the data signals that are not used for
transferring data must be forced or pulled to Vcc or to GND.
GPIO
Mode
Enhanced Universal
Bus Mode
Universal Bus Mode
HM = $1
HM = $3
HM = $2
HM = $4
7-0
HAD15-HAD0
HA10-HA3
7-0
15-8
HD7-HD0
15-8
19-16
HC3/HBE3-HC0/HBE
0
HA2-HA0
HIO18-16
UNUSED
b
b. Must be forced or pulled to Vcc or GND.
HIO19
20
HTRDY HDBEN
20
21
HIRDY
H DBDR
21
22
HDEVSEL
HSAK
22
23
HLOCK
HBS
c
c.
HBS/HDAK should be forced or pulled up to Vcc if not used.
HIO23
24
HPAR
HDAK
c
disconnected
25
HPERR
HDRQ
26
HGNT
HAEN
27
HREQ
HTA
28
HSERR HIRQ
29
HSTOP
HWR/HRW
30
HIDSEL
HRD/HDS
31
HFRAME
UNUSED
d
d. Must be forced or pulled up to Vcc.
32
HCLK
UNUSED
d
40-33
HAD23-HAD16
HD15-8
disconnected
48-41
HAD31-HAD24
HD23-16
Output is high impedance if HRF
π
$0.
Input is disconnected if HTF
π
$0.
49
HRST
HRST
50
HINTA
Содержание DSP56305
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Страница 145: ...MOTOROLA DSP56305 User s Manual 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 146: ...5 2 DSP56305 User s Manual MOTOROLA General Purpose I O 5 1 Introduction 5 3 5 2 Programming Model 5 3 ...
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