DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 483

• 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: -

15.5.2
Even if a timer counter clock pulse is generated during the T
write takes priority and the timer counter is not incremented. Figure 15.7 shows this operation.
15.5.3
If bits CKS2 to CKS0 in TCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must stop the watchdog timer (by clearing the TME bit to 0) before
changing the values of bits CKS2 to CKS0.
15.5.4
If the mode is switched between watchdog timer and interval timer, while the WDT is operating,
errors could occur in the incrementation. Software must stop the watchdog timer (by clearing the
TME bit to 0) before switching the mode.
Conflict between Timer Counter (TCNT) Write and Increment
Changing Values of CKS2 to CKS0 Bits
Switching between Watchdog Timer Mode and Interval Timer Mode
φ
Address
Internal write signal
TCNT input clock
TCNT
Figure 15.7 Conflict between TCNT Write and Increment
N
TCNT write cycle
T 1
T 2
2
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Counter write data
state of a TCNT write cycle, the
M
REJ09B0059-0200