R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 798

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 17 I
17.7
17.7.1
Issue a start (retransmission) or stop condition after the falling edge of the 9th clock has been
recognized. The falling edge of the 9th clock can be recognized by checking the SCLO bit in the
I
certain timing under the following conditions (1 or 2), the start (retransmission) or stop condition
may not be output correctly.
1. SCL takes longer to rise than the period defined in section 17.6, Bit Synchronous Circuit, due
2. The low-level period between the 8th and 9th clock is prolonged by the slave device, which
17.7.2
In multi-master operation, when the transfer rate setting for this module (ICCR1.CKS[3:0]) makes
this LSI slower than the other masters, pulse cycles with an unexpected length will infrequently be
output on SCL.
Be sure to specify a transfer rate that is at least 1/1.8 of the fastest transfer rate among the other
masters.
17.7.3
Reading ICDRR around the falling edge of the 8th clock might fail to fetch the receive data.
In addition, when RCVD is set to 1 around the falling edge of the 8th clock and the receive buffer
full, a stop condition may not be issued.
Use either 1 or 2 below as a measure against the situations above.
1. In master receive mode, read ICDRR before the rising edge of the 8th clock.
2. In master receive mode, set the RCVD bit to 1 so that transfer proceeds in byte units.
17.7.4
In master receive mode operation, set ACKBT before the falling edge of the 8th SCL cycle of the
last data being continuously transferred. Not doing so can lead to an overrun for the slave
transmission device.
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2
C bus control register 2 (ICCR2). When a start (retransmission) or stop condition is issued with a
to the load of the SCL bus (load capacitance or pull-up resistance).
activates the bit synchronous circuit.
Usage Note
Issuance of Stop Condition and Start Condition (Retransmission)
Note on Setting for Multi-Master Operation
Note on Master Receive Mode
Note on Setting ACKBT in Master Receive Mode
2
C Bus Interface 3 (IIC3)
R01UH0026EJ0300 Rev. 3.00
SH7201 Group
Sep 24, 2010