h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 532

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 I
Bit 4
AASX
0
1
Bit 3—Arbitration Lost (AL): This flag indicates that arbitration was lost in master mode. The
I
nearly the same time, if the I
to 1 to indicate that the bus has been taken by another master.
AL is cleared by reading AL after it has been set to 1, then writing 0 in AL. In addition, AL is
reset automatically by write access to ICDR in transmit mode, or read access to ICDR in receive
mode.
Bit 3
AL
0
1
Bit 2—Slave Address Recognition Flag (AAS): In I
set to 1 if the first frame following a start condition matches bits SVA6 to SVA0 in SAR, or if the
general call address (H'00) is detected.
Rev. 4.00 Jun 06, 2006 page 478 of 1004
REJ09B0301-0400
2
C bus interface monitors the bus. When two or more master devices attempt to seize the bus at
Description
Second slave address not recognized
[Clearing conditions]
1. When 0 is written in AASX after reading AASX = 1
2. When a start condition is detected
3. In master mode
Second slave address recognized
[Setting condition]
When the second slave address is detected in slave receive mode while FSX = 0
Description
Bus arbitration won
[Clearing conditions]
1. When ICDR data is written (transmit mode) or read (receive mode)
2. When 0 is written in AL after reading AL = 1
Arbitration lost
[Setting conditions]
1. If the internal SDA and SDA pin disagree at the rise of SCL in master transmit
2. If the internal SCL line is high at the fall of SCL in master transmit mode
2
C Bus Interface [H8S/2138 Group Option]
mode
2
C bus interface detects data differing from the data it sent, it sets AL
2
C bus format slave receive mode, this flag is
(Initial value)
(Initial value)