DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 464

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 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: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 Watchdog Timer
12.4
During interval timer operation, an overflow generates an interval timer interrupt (WOVI). The
interval timer interrupt is requested whenever the OVF bit is set to 1 in TCSR.
12.5
Contention between TCNT Write and Increment: If a timer counter clock pulse is generated
during the T
incremented. See figure 12.8.
Changing CKS2 to CKS0 Values: Halt TCNT by clearing the TME bit to 0 in TCSR before
changing the values of bits CKS2 to CKS0.
Rev. 3.00 Mar 21, 2006 page 434 of 814
REJ09B0302-0300
Interrupts
Usage Notes
3
state of a write cycle to TCNT, the write takes priority and the timer count is not
TCNT
Internal write
signal
TCNT input
clock
TCNT
Figure 12.8 Contention between TCNT Write and Increment
Write cycle: CPU writes to TCNT
T
1
N
T
2
T
3
M
Counter write data