DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 569

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

17.6
In master mode,
• When the SCL is driven low by the slave device
• When the rising speed of the SCL is lower by the load of the SCL line (load capacitance or
This module has a possibility that the high level period may be short in the two states described
above. Therefore it monitors the SCL and communicates by bits with synchronization.
Figure 17.18 shows the timing of the bit synchronous circuit and table 17.4 shows the time when
SCL output changes from low to Hi-Z then the SCL is monitored.
Table 17.4 Time for Monitoring SCL
CKS3
0
1
pull-up resistance)
Bit Synchronous Circuit
Reference clock
for SCL monitor
timing
Internal SCL
CKS2
0
1
0
1
SCL
Figure 17.18 Timing of Bit Synchronous Circuit
7.5 tcyc
19.5 tcyc
17.5 tcyc
41.5 tcyc
Time for Monitoring SCL
VIH
Rev.2.00 May. 28, 2009 Page 529 of 732
Section 17 I
2
C Bus Interface 3 (IIC3)
REJ09B0059-0200