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Giải thích chi tiết về linh kiện  Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M)
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EB632 bảng dữ liệu(HTML) 35 Page - Freescale Semiconductor, Inc

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HDI16
Functional Differences Between MSC8101 (Mask 2K42A) and MSC8103 (Mask 2K87M), Rev. 2
Freescale Semiconductor
35
The host processor acknowledges host interrupts by executing an interrupt service routine. The host processor tests
the appropriate status bit (TXDE, TXDE16, TXDE32, RXDF, RXDF16, or RXDF32, depending on the
application) to determine the interrupt source. The host processor interrupt service routine must read or write the
appropriate HDI16 data register to clear the interrupt. HREQ is deasserted under the following conditions:
•
The enabled request is cleared or masked.
•
The SC140 core is reset.
Figure 10. HDI16 Host Request Structure
TREQ
RREQ
ICR[8–15]
815
INIT
8
15
TRDY
TXDE
RXDF
ISR[8–15]
HREQ
Host Request
Asserted
HREQ
ICR[0–7]
01
0
1
HRRA
HTRA
ISR[0–7]
RXDF16
HTRQ
HRRQ
TXDE32TXDE16 RXDF32



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