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R8C/29 Datasheet(PDF) 265 Page - Renesas Technology Corp

Part # R8C/29
Description  RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES
PDF  471 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C/29 Datasheet(HTML) 265 Page - Renesas Technology Corp

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R8C/28 Group, R8C/29 Group
15. Serial Interface
Rev.2.10
Sep 26, 2008
Page 248 of 441
REJ09B0279-0210
15.3
Notes on Serial Interface
• When reading data from the UiRB (i = 0 or 1) register either in the clock synchronous serial I/O mode or in the
clock asynchronous serial I/O mode. Ensure the data is read in 16-bit units. When the high-order byte of the
UiRB register is read, bits PER and FER in the UiRB register and the RI bit in the UiC1 register are set to 0.
To check receive errors, read the UiRB register and then use the read data.
Example (when reading receive buffer register):
MOV.W
00A6H,R0
; Read the U0RB register
• When writing data to the UiTB register in the clock asynchronous serial I/O mode with 9-bit transfer data
length, write data to the high-order byte first then the low-order byte, in 8-bit units.
Example (when reading transmit buffer register):
MOV.B
#XXH,00A3H
; Write the high-order byte of U0TB register
MOV.B
#XXH,00A2H
; Write the low-order byte of U0TB register



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