4-34 DSP56012 User’s Manual MOTOROLA

Parallel Host Interface
Host Interface (HI)

Table 4-5 HI Registers after Reset (Host Side)

Register
Name Register
Data
Reset Type
HW
Reset SW
Reset IR
Reset ST
Reset
ICR
$0
INIT 0 0 0 0
HM (1–0) 0 0 0 0
TREQ 0 0 0 0
RREQ 0 0 0 0
HF (1–0) 0 0 0 0
CVR
$1
HC 0000
HV (5–0) $17 $17 $17 $17
ISR
$2
HOREQ 0 0 0 0
DMA 0 0 0 0
HF (3–2) 0 0
TRDY 1 1 1 1
TXDE 1 1 1 1
RXDF 0 0 0 0
IVR
$3 IV (7–0) $0F $0F
RXH
$5 RXH
(23–16) ———
RXM
$6 RXM (15–8)
RXL
$7 RXL (7–0)
TXH
$5 TXH
(23–21) ———
TXM
$6 TXM (15–8)
TXL
$7 TXL (7–0)