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R01UH0823EJ0100 Rev.1.00 Page 1140 of 1823

Jul 31, 2019

RX23W Group 35. I

C-bus Interface (RIICa)

35.2.12 Slave Address Register Uy (SARUy) (y = 0 to 2)

FS Bit (7-Bit/10-Bit Address Format Select)

This bit is used to select 7-bit address or 10-bit address for slave address y (in registers SARLy and SARUy).

When the ICSER.SARyE bit is set to 1 (registers SARLy and SARUy enabled) and the SARUy.FS bit is 0, the 7-bit

address format is selected for slave address y, the SARLy.SVA[6:0] bits setting is valid, and the settings of the SVA[1:0]

bits and the SARLy.SVA0 bit are ignored.

When the ICSER.SARyE bit is set to 1 (registers SARLy and SARUy enabled) and the SARUy.FS bit is 1, the 10-bit

address format is selected for slave address y and the settings of the SVA[1:0] bits and SARLy are valid.

While the ICSER.SARyE bit is 0 (registers SARLy and SARUy disabled), the setting of the SARUy.FS bit is invalid.

SVA[1:0] Bits (10-Bit Address Upper Bits)

When the 10-bit address format is selected (FS = 1), these bits function as the upper 2 bits of a 10-bit address.

When the ICSER.SARyE bit 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.

Address(es): RIIC0.SARU0 0008 830Bh, RIIC0.SARU1 0008 830Dh, RIIC0.SARU2 0008 830Fh

b7 b6 b5 b4 b3 b2 b1 b0

————— SVA[1:0] FS

Value after reset:

00000000

Bit Symbol Bit Name Description R/W

b0 FS 7-Bit/10-Bit Address Format Select 0: The 7-bit address format is selected.

1: The 10-bit address format is selected.

R/W

b2, b1 SVA[1:0] 10-Bit Address Upper Bits A slave address is set. R/W

b7 to b3 — Reserved These bits are read as 0. The write value should be 0. R/W

Renesas RX Series User Manual

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