DF2238RTF6 Renesas Electronics America, DF2238RTF6 Datasheet - Page 742

• Manufacturer Part Number: DF2238RTF6
• Description: MCU 2.2/3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2238RTF6

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 6MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2238RTF6; HD64F2238RTF6

Section 16 I
7. Note on ICDR Read at End of Master Reception
Rev. 6.00 Mar. 18, 2010 Page 680 of 982
REJ09B0054-0600
SCL
Internal clock
SDA
BBSY bit
To halt reception after completion of a receive operation in master receive mode, set the TRS
bit to 1 and write 0 to BBSY and SCP in ICCR. This changes the SDA pin from low to high
when the SCL pin is high, and generates the stop condition. After this, receive data can be read
by means of an ICDR read, but if data remains in the buffer the ICDRS receive data will not be
transferred to ICDR, and so it will not be possible to read the second byte of data. If it is
necessary to read the second byte of data, issue the stop condition in master receive mode (i.e.
with the TRS bit cleared to 0). When reading the receive data, first confirm that the BBSY bit
in ICCR is cleared to 0, the stop condition has been generated, and the bus has been released,
then read ICDR with TRS cleared to 0. Note that if the receive data (ICDR data) is read in the
interval between execution of the instruction for issuance of the stop condition (writing of 0 to
BBSY and SCP in ICCR) and the actual generation of the stop condition, the clock may not be
output correctly in subsequent master transmission.
Clearing of the MST bit after completion of master transmission/reception, or other
modifications of IIC control bits to change the transmit/receive operating mode or settings,
must be carried out during interval (a) in figure 16.21 (after confirming that the BBSY bit has
been cleared to 0 in the ICCR register).
Figure 16.21 Points for Attention Concerning Reading of Master Receive Data
6. Value when the IICX bit is set to 1. When the IICX bit is cleared to 0, the value is 6t
7. The H8S/2258 Group is out of operation.
2
C Bus Interface (IIC) (Option)
Master receive mode
Bit 0
8
A
9
Execution of stop
condition issuance
instruction
(0 written to BBSY
and SCP)
ICDR reading
prohibited
Confirmation of stop
condition generation
(0 read from BBSY)
Stop condition
(a)
Start condition
issuance
Start condition
cyc
.