Renesas RX600 Series, User Manual

Page: 721 / 1006

RX610 Group 22. I
2
C Bus Interface (RIIC)
R01UH0032EJ0120 Rev.1.20 Page 721 of 1006
Feb 20, 2013
22.2.12 Slave Address Register Uy (SARUy) (y = 0 to 2)
Addresses: RIIC0.SARU0 0008 830Bh, RIIC1.SARU0 0008 832Bh
RIIC0.SARU1 0008 830Dh, RIIC1.SARU1 0008 832Dh
RIIC0.SARU2 0008 830Fh, RIIC1.SARU2 0008 832Fh
b7 b6 b5 b4 b3 b2 b1 b0
Value after reset: 0 0 0 0 0 0 0 0
— — — — — FS
SVA[9:8]
Bit Symbol Bit Name Description R/W
b0 FS 7-Bit/10-Bit Address Format
Selection
0: The 7-bit address format is selected
1: The 10-bit address format is selected
R/W
b2, b1 SVA[9:8] 10-Bit Address Upper Bits A slave address is set
•
When the SARUy.FS bit is 0 (7-bit address format), these bits are
invalid
•
When the SARUy.FS bit is 1 (10-bit address format), these bits form
the upper two bits of a 10-bit slave address
R/W
b7 to b3
―
Reserved These bits are always read as 0. The write value should always be 0. R/W
SARUy selects 7-bit address format or 10-bit address format and sets the upper bits of a 10-bit slave address.
FS Bit (7-Bit/10-Bit Address Format Selection)
This bit is used to select 7-bit address or 10-bit address for slave address m (in SARLy and SARUy).
When the SARyE bit in ICSER is set to 1 (SARLy and SARUy enabled) and the SARUy.FS bit is 0, the 7-bit address
format is selected for slave address m, the SVA[7:1] setting in SARLy is valid, and the settings of the SVA[9:8] bits and
the SVA0 bit in SARLy are ignored.
When the SARyE bit in ICSER is set to 1 (SARLy and SARUy enabled) and the SARUy.FS bit is 1, the 10-bit address
format is selected for slave address m and the settings of the SVA[9:8] bits and SARLy are valid.
While the SARyE bit in ICSER is 0 (SARLy and SARUy disabled), the setting of the SARUy.FS bit is invalid.
SVA[9:8] Bits (10-Bit Address Upper Bits)
When the 10-bit address format is selected (FS = 1), these bits function as the upper two bits of a 10-bit address.
When the SARyE bit in ICSER is set to 1 (SARLy and SARUy enabled) and the SARUy.FS bit is 1, these bits are valid.
While the SARUy.FS bit or SARyE bit is 0, the setting of these bits is ignored.