DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 346

• 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: -

11.9.4
If compare-matches A and B occur at the same time, the 8-bit timer operates in accordance with
the priorities for the output states set for compare-match A and compare-match B, as shown in
table 11.4.
Table 11.4 Timer Output Priorities
11.9.5
TCNT may be incremented erroneously when the internal clock is switched over. Table 11.5
shows the relationship between the timing at which the internal clock is switched (by writing to
the CKS1 and CKS0 bits) and the TCNT operation.
When the TCNT clock is generated from an internal clock, the falling edge of the internal clock
pulse is detected. If clock switching causes a change from high to low level, as shown in no. 3 in
table 11.5, a TCNT clock pulse is generated on the assumption that the switchover is a falling edge,
and TCNT is incremented.
Erroneous incrementation can also happen when switching between internal and external clocks.
Rev.2.00 May. 28, 2009 Page 306 of 732
REJ09B0059-0200
Output Setting
Toggle output
1 output
0 output
No change
Conflict between Compare-Matches A and B
Switching of Internal Clocks and TCNT Operation
Priority
High
Low