R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 914

• Manufacturer Part Number: R4F24278NVFQU
• Description: MCU 512K/48K 2.7-5.5V 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24278NVFQU

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 98
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Section 14 8-Bit Timers (TMR)
14.7.4
If compare match events A and B occur at the same time, the 8-bit timer operates in accordance
with the priorities for the output statuses set for compare match A and compare match B, as shown
in table 14.5.
Table 14.5 Timer Output Priorities
14.7.5
TCNT may increment erroneously when the internal clock is switched over. Table 14.6 shows the
relationship between the timing at which the internal clock is switched (by writing to the CKS1,
CKS0, ICKS1, and ICKS0 bits) and the TCNT operation.
When the TCNT clock is generated from an internal clock, the rising edge or falling edge of the
internal clock pulse is detected. Therefore, when the falling edge is selected, if clock switching
causes a change from high to low level, as shown in case 3 in table 14.6, a TCNT clock pulse is
generated and the TCNT incremented on the assumption that the switchover is a falling edge. This
is the same as when the rising edge is selected.
The erroneous incrementation can also happen when switching between the rising edge and falling
edge of an internal clock or switching between internal and external clocks.
Page 884 of 1448
Output Setting
Toggle output
1 output
0 output
No change
Contention between Compare Matches A and B
Switching of Internal Clocks and TCNT Operation
H8S/2427, H8S/2427R, H8S/2425 Group
REJ09B0565-0100 Rev. 1.00
Priority
High
Low
Jul 22, 2010