M16C65 Datasheet, PDF (626/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
25. Multi-Master I²C-bus Interface
AAS (Slave Address Compare Flag) (b2)
The AAS bit function in read access is described as follows. See Table 25.10 “Functions Enabled by
Writing to the S10 Register” for the bit function in write access.
Condition to become 0:
• The S00 register is written.
• The ES0 bit in the S1D0 register is set to 0 (I²C interface disabled).
• The IHR bit in the S1D0 register is set to 1 (I²C interface reset).
Condition to become 1:
• In slave-receiver mode, the ALS bit in the S1D0 register is set to 0 (addressing format) and the
received slave address is matched with bits SAD6 to SAD0 in any of registers S0D0 to S0D2.
• In slave-receiver mode, the ALS bit in the S1D0 register is set to 0 (addressing format) and the
general call address (0000000b) is received.
AL (Arbitration Lost Detection Flag) (b3)
The AL bit function in read access is described as follows. See Table 25.10 “Functions Enabled by
Writing to the S10 Register” for the bit function in write access.
Condition to become 0:
• The S00 register is written.
• The ES0 bit in the S1D0 register is set to 0 (I²C interface disabled).
• The IHR bit in the S1D0 register is set to 1 (I²C interface reset).
Condition to become 1:
• In master-transmitter mode or master-receiver mode, the SDAMM pin level changes to low by an
external device, not by the ACK clock, when slave address is transmitted.
• The SDAMM pin level changes to low by an external device for other than the ACK clock when
data is transmitted in master-transmitter mode.
• In master-transmitter mode or master-receiver mode, the SDAMM pin level changes to low by an
external device when start condition is transmitted.
• In master-transmitter mode or master-receiver mode, the SDAMM pin level changes to low by an
external device when stop condition is transmitted.
• The function to avoid start condition overlaps is started.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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