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PICDEM2 数据表(PDF) 27 Page - Microchip Technology

部件名 PICDEM2
功能描述  simple board
PDF  60 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

PICDEM2 数据表(HTML) 27 Page - Microchip Technology

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PICDEM 2 User’s Guide
DS30374D-page 22
 2001 Microchip Technology Inc.
5.1.3
TX and RX Routines
The TX and RX routines transmit and receive 8 data bits, respectively. Data is
transmitted/received one bit at a time by left bit-shifting the transmit/receive
buffer. A counter, set initially to 8, is decremented until all 8 bits of data are
sent/received. Finally, acknowledgment bits are received/transmitted. In the
case of transmission, if an acknowledgment is not received, an error flag is
set.
Figure 5.8: Transmit
Set counter for eight bits
(BITOUT)
Send Bit
(BITIN)
Rotate transmit buffer left
Read acknowledge bit
Return
Default bit out = 0
If shifted bit = 0, data bit = 0
else data bit = 1
8 bits transmitted?
No
Yes
Acknowledgment
Yes
ERR
Received?
No



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