Section 18 I
2
C Bus Interface (IIC)
Rev. 1.00 Apr. 28, 2008 Page 546 of 994
REJ09B0452-0100
Bit Bit
Name
Initial
Value R/W Description
1 IRIC 0
R/(W)
*
I
2
C Bus Interface Interrupt Request Flag
Indicates that the I
2
C bus interface has issued an
interrupt request to the CPU.
IRIC is set at different times depending on the FS bit in
SAR, the FSX bit in SARX, and the WAIT bit in ICMR.
See section 18.4.7, IRIC Setting Timing and SCL
Control. The conditions under which IRIC is set also
differ depending on the setting of the ACKE bit in
ICCR.
[Setting conditions]
All operating modes:
1. When a start condition is detected in transmit mode
and the ICDRE flag is set to 1
2. When data is transferred from ICDRT to ICDRS in
transmit mode and the ICDRE flag is set to 1
3. When data is transferred from ICDRS to ICDRR in
receive mode and the ICDRF flag is set to 1
4. If 1 is received as the acknowledge bit (when the
ACKE bit is 1 in transmit mode) at the completion of
data transmission
I
2
C bus format master mode:
1. When a wait is inserted between the data and
acknowledge bit when the WAIT bit is 1
2. When the AL flag is set to 1 after bus arbitration is
lost while the ALIE bit is 1
I
2
C bus format slave mode:
1. When the slave address (SVA or SVAX) matches
after the reception of the first frame following the
start condition and the AAS flag or AASX flag is set
to 1
2. When the general call address is detected after the
reception of the first frame following the start
condition and the ADZ flag is set to 1 (the FS bit in
SAR is 0)
3. When a stop condition is detected (when the STOP
or ESTP flag is set to 1) while the STOPIM bit is 0
Summary of Contents for H8S/2100 Series
Page 2: ...Rev 1 00 Apr 28 2008 Page ii of xxvi...
Page 54: ...Section 1 Overview Rev 1 00 Apr 28 2008 Page 28 of 994 REJ09B0452 0100...
Page 92: ...Section 2 CPU Rev 1 00 Apr 28 2008 Page 66 of 994 REJ09B0452 0100...
Page 158: ...Section 5 Interrupt Controller Rev 1 00 Apr 28 2008 Page 132 of 994 REJ09B0452 0100...
Page 244: ...Section 8 8 Bit PWM Timer PWMU Rev 1 00 Apr 28 2008 Page 218 of 994 REJ09B0452 0100...
Page 330: ...Section 10 16 Bit Timer Pulse Unit TPU Rev 1 00 Apr 28 2008 Page 304 of 994 REJ09B0452 0100...
Page 416: ...Section 13 8 Bit Timer TMR Rev 1 00 Apr 28 2008 Page 390 of 994 REJ09B0452 0100...
Page 612: ...Section 18 I 2 C Bus Interface IIC Rev 1 00 Apr 28 2008 Page 586 of 994 REJ09B0452 0100...
Page 706: ...Section 20 LPC Interface LPC Rev 1 00 Apr 28 2008 Page 680 of 994 REJ09B0452 0100...
Page 752: ...Section 21 FSI Interface Rev 1 00 Apr 28 2008 Page 726 of 994 REJ09B0452 0100...
Page 774: ...Section 23 RAM Rev 1 00 Apr 28 2008 Page 748 of 994 REJ09B0452 0100...
Page 1008: ...Section 28 Electrical Characteristics Rev 1 00 Apr 28 2008 Page 982 of 994 REJ09B0452 0100...
Page 1020: ...Rev 1 00 Apr 28 2008 Page 994 of 994 REJ09B0452 0100...
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Page 1024: ...H8S 2117R Group Hardware Manual...