HD64F2239TF20I Renesas Electronics America, HD64F2239TF20I Datasheet - Page 532

• Manufacturer Part Number: HD64F2239TF20I
• Description: MCU 3V 384K I-TEMP 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of HD64F2239TF20I

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 13 Watchdog Timer (WDT)
• TCSR_1
Rev. 6.00 Mar. 18, 2010 Page 470 of 982
REJ09B0054-0600
Bit
7
6
5
4
3
Bit Name
OVF
WT/IT
TME
PSS
RST/NMI
Initial
Value
0
0
0
0
0
R/W
R/(W)
*
R/W
R/W
R/W
R/W
1
Description
Overflow Flag
Indicates that TCNT has overflowed. Only a 0 can
be written to this bit, to clear the flag.
[Setting condition]
When TCNT overflows (changes from H'FF to
H'00)
When internal reset request generation is selected
in watchdog timer mode, OVF is cleared
automatically by the internal reset.
[Clearing condition]
Cleared by reading TCSR*
writing 0 to OVF
Timer Mode Select
Selects whether the WDT is used as a watchdog
timer or interval timer.
0: Interval timer mode (an interval timer interrupt
1: Watchdog timer mode (a power-on reset or NMI
Timer Enable
When this bit is set to 1, TCNT starts counting.
When this bit is cleared, TCNT stops counting and
is initialized to H'00.
Prescaler Select
Selects the clock source input to TCNT of WDT_1
0: TCNT counts divided clock of φ-base prescaler
1: TCNT counts divided clock of φ
Reset or NMI (RST/NMI)
When TCNT overflows in watchdog timer mode,
either a power-on reset or NMI interrupt is
selected.
0: An NMI interrupt is requested
1: Reset is requested
(WOVI) is requested to CPU)
interrupt is requested to CPU)
(PSM)
prescaler (PSS)
2
when OVF = 1, then
SUB
-base