Motorola MSC8101 ADS User's Guide Page 289

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Programming Sheets
MSC8101 User’s Guide A-35
0123456789101112131415
HDM0HF0 HF1 HDM1 HF2 HF3
0
*
*
= Reserved. Write to 0 for future compatibility
0
*
0000
****
INIT
When the host sets the INIT bit, the HDI16 hardware executes the
INIT Force Initialization
, Bit 8
INIT command. The interface hardware clears the INIT bit after the
command executes
HDRQ
These bits reflect the status of the HCR[HDM] bits, which indicate
HDM[0–1] – Host DMA Mode
, Bits 9–10
the transfer data size
ICR (DMA=0, DMA=1, HICR=0)
Interface Control Register
Address: 0x0
Hardware Reset: 0,
Read/Write: 0–8, 11–15
HOST INTERFACE
(HDI16)
Individual Reset: All bit values are indeterminate after reset
Read Only: 9–10
TREQ RREQ
(Note 1) (Note 2) (Note 3)
HPCR[DMA]
Reflects the status off
HCR[HDM0]
Reserved
01
RREQ – HREQ and HRREQ Pin Control, Bit 15
These bits are reflected in the HSR[HF] bits
HF[0–1] – Host Flags 0–1
, Bits 5–6
These bits are reflected in the HSR[HF] bits
HF[2–3] – Host Flags 2–3
, Bits 11–12
Note 1: If ICR (DMA=0, HICR=0) then this pin functions as HDRQ;
ICR (DMA=0, HICR=0)
otherwise, this bit is reserved and should be written to zero
0 HREQ/HTRQ and HACK/HRRQ pins function as HREQ
and HACK, respectively
1 HREQ/HTRQ and HACK/HRRQ pins function as HTRQ
and HRRQ, respectively
HDRQ – HREQ/HTRQ and HACK/HRRQ Pin Control, Bit 13
Note 3:
RREQ when written, HDM0 when read
HPCR[DMA]
Reserved
Reflects the status of
01
TREQ – HREQ and HTREQ Pin Control, Bit 14
HCR[HDM0]
Note 2:
TREQ when written, HDM0 when read
ICR1
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