Datasheet

V850ES/JG3 CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE A (UARTA)
R01UH0015EJ0300 Rev.3.00 Page 449 of 870
Sep 30, 2010
15.1.3 UARTA1 and I
2
C02 mode switching
In the V850ES/JG3, UARTA1 and I
2
C02 are alternate functions of the same pin and therefore cannot be used
simultaneously. Set UARTA1 in advance, using the PMC9, PFC9, and PMCE9 registers, before use.
Caution The transmit/receive operation of UARTA1 and I
2
C02 is not guaranteed if these functions are
switched during transmission or reception. Be sure to disable the one that is not used.
Figure 15-3. UARTA1 and I
2
C02 Mode Switch Settings
PMC9
After reset: 0000H R/W Address: FFFFF452H, FFFFF453H
PMC97 PMC96 PMC95 PMC94 PMC93 PMC92 PMC91 PMC90
PMC915 PMC914 PMC913 PMC912 PMC911 PMC910 PMC99 PMC98
89101112131415
PFC9
After reset: 0000H R/W Address: FFFFF472H, FFFFF473H
PFC915 PFC914 PFC913 PFC912 PFC911 PFC910 PFC99 PFC98
PFC97 PFC96 PFC95 PFC94 PFC93 PFC92 PFC91 PFC90
89101112131415
PFCE915 PFCE914 0 0 0 0 0 0
PFCE97 PFCE96 PFCE95 PFCE94 PFCE93 PFCE92 PFCE91 PFCE90
89101112131415
PFCE9
After reset: 0000H R/W Address: FFFFF712H, FFFFF713H
UARTA1 mode
I
2
C02 mode
PMC9n
1
1
Operation mode
PFCE9n
1
1
PFC9n
0
1
Remark n = 0, 1