Datasheet

V850ES/JG3 CHAPTER 17 I
2
C BUS
R01UH0015EJ0300 Rev.3.00 Page 534 of 870
Sep 30, 2010
17.1.2 CSIB0 and I
2
C01 mode switching
In the V850ES/JG3, CSIB0 and I
2
C01 are alternate functions of the same pin and therefore cannot be used
simultaneously. Set I
2
C01 in advance, using the PMC4 and PFC4 registers, before use.
Caution The transmit/receive operation of CSIB0 and I
2
C01 is not guaranteed if these functions are switched
during transmission or reception. Be sure to disable the one that is not used.
Figure 17-2. CSIB0 and I
2
C01 Mode Switch Settings
Port I/O mode
CSIB0 mode
I
2
C01 mode
PMC4n
0
1
1
Operation mode
PFC4n
×
0
1
0PMC4 0 0 0 0 PMC42 PMC41 PMC40
After reset: 00H R/W Address: FFFFF448H
PFC4
After reset: 00H R/W Address: FFFFF468H
0 0 0 0 0 0 PFC41 PFC40
Remarks 1. n = 0, 1
2. × = don’t care