D12312SVTE25 Renesas Electronics America, D12312SVTE25 Datasheet - Page 452

• Manufacturer Part Number: D12312SVTE25
• Description: MCU 3V 0K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVTE25

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K 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: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: HD6412312SVTE25; HD6412312SVTE25

Section 11 Watchdog Timer
11.2
11.2.1
TCNT is an 8-bit readable/writable *
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from the internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), either the watchdog timer overflow signal (WDTOVF) *
interrupt (WOVI) is generated, depending on the mode selected by the WT/IT bit in TCSR.
TCNT is initialized to H'00 by a reset, in hardware standby mode, or when the TME bit is cleared
to 0. It is not initialized in software standby mode.
Notes: 1. TCNT is write-protected by a password to prevent accidental overwriting. For details
Rev.7.00 Feb. 14, 2007 page 418 of 1108
REJ09B0089-0700
Bit
Initial value :
R/W
2. The WDTOVF function is not available in the F-ZTAT versions.
Register Descriptions
Timer Counter (TCNT)
see section 11.2.4, Notes on Register Access.
:
:
R/W
7
0
R/W
6
0
1
up-counter.
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
or an interval timer
2
0
R/W
1
0
R/W
0
0