DF2239TF16I Renesas Electronics America, DF2239TF16I Datasheet - Page 530

• Manufacturer Part Number: DF2239TF16I
• Description: MCU 3V 384K I-TEMP 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2239TF16I

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 16MHz
• 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: -
• Other names: HD64F2239TF16I; HD64F2239TF16I

Section 13 Watchdog Timer (WDT)
13.3.1
TCNT is an 8-bit readable/writable up-counter. TCNT is initialized to H'00 when the TME bit in
TCSR is cleared to 0.
To initialize TCNT to H'00 while the timer is operating, write H'00 to TCNT directly. See 13.6.7,
Notes on Initializing TCNT by Using the TME Bit.
13.3.2
TCSR functions include selecting the clock source to be input to TCNT and the timer mode.
• TCSR_0
Rev. 6.00 Mar. 18, 2010 Page 468 of 982
REJ09B0054-0600
Bit
7
6
5
4, 3
Bit Name
OVF
WT/IT
TME
⎯
Timer Control/Status Register (TCSR)
Timer Counter (TCNT)
Initial
Value
0
0
0
All 1
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 (internal reset selectable)
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.
Reserved
These bits are always read as 1 and cannot be
modified.
(WOVI) is requested to CPU)
2
when OVF = 1, then