DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 440

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 Watchdog Timer (WDT)
12.6.2
If a timer counter clock pulse is generated during the T
takes priority and the timer counter is not incremented. Figure 12.8 shows this operation.
12.6.3
If the PSS or CKS0 to CKS2 bits in TCSR are modified while the WDT is operating, errors could
occur in the incrementation. Software must be used to stop the watchdog timer (by clearing the
TME bit to 0) before changing the value of the PSS or CKS0 to CKS2 bits.
12.6.4
If the mode is switched between watchdog timer mode and interval timer mode while the WDT is
operating, errors could occur. Software must be used to stop the watchdog timer (by clearing the
TME bit to 0) before switching the timer mode.
Rev. 6.00 Sep. 24, 2009 Page 392 of 928
REJ09B0099-0600
Contention between Timer Counter (TCNT) Write and Increment
Changing Value of PSS or CKS2 to CKS0
Switching between Watchdog Timer Mode and Interval Timer Mode
Address
Internal write signal
TCNT input clock
TCNT
φ
Figure 12.8 Contention between TCNT Write and Increment
TCNT write cycle
T 1
N
T 2
2
state of a TCNT write cycle, the write
Counter write data
M