DF2218BR24V Renesas Electronics America, DF2218BR24V Datasheet - Page 400

• Manufacturer Part Number: DF2218BR24V
• Description: IC H8S/2218 MCU FLASH 112-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2218BR24V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 24MHz
• Connectivity: SCI, SmartCard, USB
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 6x10b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 112-LFBGA
• For Use With: HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)3DK2218-SS - KIT DEV H8S/2218 WINDOWS SIDESHW3DK2218 - DEV EVAL KIT H8S/2218
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

10.3.2
With WDT, the WOVF bit in RSTCSR is set to 1 if TCNT overflows in watchdog timer mode. If
TCNT overflows while the RSTE bit in RSTCSR is set to 1, an internal reset signal is generated
for the entire chip. This timing is illustrated in figure 10.3.
10.3.3
To use the WDT as an interval timer, clear bit WT/IT in TCSR to 0 and set bit TME to 1. When
the interval timer is operating, an interval timer interrupt (WOVI) is generated each time the
TCNT overflows. Therefore, an interrupt can be generated at intervals.
Rev.7.00 Dec. 24, 2008 Page 344 of 698
REJ09B0074-0700
Overflow signal
(internal signal)
Internal reset
signal
φ
WOVF
TCNT
Legend:
WOVI: Interval interrupt request generation
H'FF
H'00
Timing of Setting of Watchdog Timer Overflow Flag (WOVF)
Interval Timer Mode
TCNT count
WT/IT = 0
TME = 1
Figure 10.4 Operation in Interval Timer Mode
Figure 10.3 Timing of WOVF Setting
Overflow
WOVI
H'FF
Overflow
WOVI
Overflow
WOVI
518 states (WDT0)
H'00
Overflow
WOVI
Time