DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 455

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 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: Lead free / RoHS Compliant
• Eeprom Size: -

12.2
12.2.1
TCNT is an 8-bit readable and writable* up-counter.
Bit
Initial value
Read/Write
When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from an internal
clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from
H'FF to H'00), the OVF bit is set to 1 in TCSR. TCNT is initialized to H'00 by a reset and when
the TME bit is cleared to 0.
Note: * TCNT is write-protected by a password. For details see section 12.2.4, Notes on Register
Access.
Register Descriptions
Timer Counter (TCNT)
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
Rev. 3.00 Mar 21, 2006 page 425 of 814
R/W
3
0
R/W
2
0
Section 12 Watchdog Timer
R/W
1
0
REJ09B0302-0300
R/W
0
0