HD64F2134FA20 Renesas Electronics America, HD64F2134FA20 Datasheet - Page 431

• Manufacturer Part Number: HD64F2134FA20
• Description: IC H8S MCU FLASH 128K 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of HD64F2134FA20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 58
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

14.2
14.2.1
TCNT is an 8-bit readable/writable * up-counter.
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 TCNT value overflows (changes
from H'FF to H'00), the OVF flag in TCSR is set to 1, and an internal reset, NMI interrupt,
interval timer interrupt (WOVI), etc., can be generated, according to the mode selected by the
WT/IT bit and RST/NMI bit.
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.
Note: * TCNT is write-protected by a password to prevent accidental overwriting. For details
Bit
Initial value
Read/Write
Register Descriptions
Timer Counter (TCNT)
see section 14.2.4, Notes on Register Access.
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
Rev. 4.00 Jun 06, 2006 page 375 of 1004
R/W
3
0
Section 14 Watchdog Timer (WDT)
R/W
2
0
R/W
REJ09B0301-0400
1
0
R/W
0
0