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EB632 데이터시트(PDF) 25 Page - Freescale Semiconductor, Inc

부품명 EB632
상세설명  Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M)
PDF  112 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

EB632 데이터시트(HTML) 25 Page - Freescale Semiconductor, Inc

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HDI16
Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M), Rev. 2
Freescale Semiconductor
25
Table 18 shows the result of the four kinds of reset on bits in each of the HDI16 registers accessible to the host
processor. The hardware reset is caused by asserting the RESET signal. The individual reset is caused by clearing
HPCR[HEN].
Table 19 shows the effects of the INIT command in relation to the values of TREQ and RREQ.
Table 20 and Table 21 summarize the effect of RREQ and TREQ on the HREQ and HRRQ signals.
Table 18. Host-Side Registers After Reset
Register
Name
Register
Data
Reset Type
Hardware (HW)
Reset
Individual (IR)
Reset
ICR
All Bits
0
—
CVR
NMI
0
0
HC
0
0
HV[0–6]
0
—
ISR
HREQ
0
1 if TREQ is set;
0 otherwise
HF[4–7]
0
—
TRDY
1
1
TXDE
1
1
RXDF
0
0
RX
RX[0–3]
empty
empty
TX
TX[0–3]
empty
empty
Table 19. Effects of the INIT Command
TREQ
RREQ
After INIT Execution
Transfer Direction
Initialized
0
0
INIT = 0
None
0
1
INIT = 0; ISR[RXDF] = 0; HSR[HTFE/HTFNF] = 1
Core to host
1
0
INIT = 0; ISR[TXDE] = 1; HSR[HRFF/HRFNE] = 0
Host to core
1
1
INIT = 0; ISR[RXDF] = 0; HSR[HTFE/HTFNF] = 1;
ISR[TXDE] = 1; HSR[HRFF/HRFNE] = 0
Host to/from core
Table 20. TREQ and RREQ Modes (HDRQ = 0) in Non-DMA Mode (HICR=1)
TREQ
RREQ
HREQ Signal
0
0
No interrupts (polling)
0
1
ISR[RXDF] request (interrupt)
1
0
ISR[TXDE] request (interrupt)
1
1
ISR[RXDF] and ISR[TXDE] request (interrupts)
Table 21. TREQ and RREQ Modes (HDRQ = 1) in Non-DMA Mode (HICR=1)
TREQ
RREQ
HTRQ Signal
HRRQ Signal
0
0
No interrupts (polling)
No interrupts (polling)
0
1
No interrupts (polling)
ISR[RXDF] request (interrupt)
1
0
ISR[TXDE] request (interrupt)
No interrupts (polling)
1
1
ISR[TXDE] request (interrupt)
ISR[RXDF] request (interrupt)



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