Figure432 bits used for dsp to host transfer, Figure 4-32, Bits used for dsp to host transfer -57 – Motorola DSP56012 User Manual
Page 137: Figure 4-32 bits used for dsp to host transfer, Parallel host interface host interface (hi)
Parallel Host Interface
Host Interface (HI)
MOTOROLA
DSP56012 User’s Manual
4-57
Figure 4-32
Bits Used for DSP to Host Transfer
HOST
DSP56012
RXDF—RECEIVE D
A
T
A
REGISTER FULL
1 = INDICA
TES
THE RECIEVE BYTE REGISTERS (RXH, RXM, RXL)
CONT
AIN D
A
T
A
FR
OM
THE DSP
.
0 = CLEARED BY READING RXL.
HTDE—HOST
TRANSMIT D
A
T
A
EMPTY
1 = HO
TX IS EMPTY AND CAN BE
WRITTEN BY DSP
.
0 = HO
TX IS FULL.
HTIE—HOST
TRANSMIT INTERR
UPT ENABLE
1 = ENABLE
THE DSP INTERR
UPT
T
O
P:$0032.
0 = DISABLE
THE DSP INTERR
UPT
T
O
P:$0032.
DSP INTERR
UPT IS CA
USED BY HTDE = 1
RREQ —RECEIVE REQ
UEST ENABLE (USED
T
O
CONTR
OL
THE HOREQ
PIN)
1 = ENABLE INTERR
UPT REQ
UESTS CREA
TED BY RXDF
.
0 = DISABLE INTERR
UPT REQ
UESTS
.
$2
INTERRUPT
STATUS
REGISTER (ISR)
(READ ONLY)
$0
X:$FFE8
HOST STATUS
REGISTER (HSR)
(READ ONLY)
HOST CONTROL
REGISTER (HCR)
(READ/WRITE)
INTERRUPT
CONTROL
REGISTER (ICR)
(READ/WRITE)
X:$FFE8
HOREQ
HF3
HF2
TXDE
RXDF
70
0
DMA
6
5
432
1
TRDY
DMA
HF1
HF0
HTDE
HRDF
70
0
0
6
5
432
1
HCP
INIT
HF1
HF0
TREQ
RREQ
70
HM0
HM1
6
5
432
1
00
HF3
HF2
HTIE
HRIE
70
0
0
6
5
432
1
HCIE
MODES
AA0339