H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 355

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

The reception procedure and operations in slave receive are described below.
1. Initialize the IIC as described in section 13.4.2, Initialization.
2. Confirm that the ICDRF flag is 0. If the ICDRF flag is set to 1, read the ICDR and then clear
3. When the start condition output by the master device is detected, the BBSY flag in ICCR is set
4. When the slave address matches in the first frame following the start condition, the device
5. At the 9th clock pulse of the receive frame, the slave device returns the data in the ACKB bit
6. At the rise of the 9th clock pulse, the IRIC flag is set to 1. If the IEIC bit has been set to 1, an
7. At the rise of the 9th clock pulse, the receive data is transferred from ICDRS to ICDRR,
8. Confirm that the STOP bit is cleared to 0 and clear the IRIC flag to 0.
9. If the next read data is the third last receive frame, wait for at least one frame time to set the
10. Confirm that the ICDRF flag is set to 1 and read ICDR. This clears the ICDRF flag to 0.
11. At the rise of the 9th clock pulse or when the receive data is transferred from IRDRS to
12. When the stop condition is detected (SDA is changed from low to high when SCL is high), the
13. Clear the IRIC flag to 0.
Receive operations can be performed continuously by repeating steps [9] to [13].
14. Confirm that the ICDRF flag is set to 1, and read ICDR.
15. Clear the IRIC flag.
Clear the MST and TRS bits to 0 to set slave receive mode, and set the HNDS and ACKB bits
to 0. Clear the IRIC flag in ICCR to 0 to see the end of reception.
the IRIC flag to 0.
to 1. The master device then outputs the 7-bit slave address and transmit/receive direction
(R/W) in synchronization with the transmit clock pulses.
operates as the slave device specified by the master device. If the 8th data bit (R/W) is 0, the
TRS bit remains cleared to 0, and slave transmit operation is performed. When the slave
address does not match, receive operation is halted until the next start condition is detected.
as an acknowledge signal.
interrupt request is sent to the CPU.
If the AASX bit has been set to 1, the IRTR flag is also set to 1.
setting the ICDRF flag to 1.
ACKB bit. Set the ACKB bit after the rise of the 9th clock pulse of the second last receive
frame.
ICDRR due to ICDR read operation, the IRIC and ICDRF flags are set to 1.
BBSY flag is cleared to 0 and the STOP or ESTP flag is set to 1. If the STOPIM bit has been
cleared to 0, the IRIC flag is set to 1. In this case, execute step [14] to read the last receive
data.
Rev. 2.00 Mar 21, 2006 page 317 of 518
Section 13 I
2
C Bus Interface (IIC)
REJ09B0299-0200