DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 426

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

Section 11 Watchdog Timer
Bit 6
WT/IT IT IT IT
0
1
Notes: 1. The WDTOVF pin function is not supported by the F-ZTAT version.
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
Bit 5
TME
0
1
Bits 4 and 3—Reserved: Read-only bits, always read as 1.
Bits 2 to 0: Clock Select 2 to 0 (CKS2 to CKS0): These bits select one of eight internal clock
sources, obtained by dividing the system clock ( ), for input to TCNT.
Bit 2
CKS2
0
1
Note:
Rev. 4.00 Feb 15, 2006 page 400 of 900
REJ09B0291-0400
2. For details of the case where TCNT overflows in watchdog timer mode, see section
* The overflow period is the time from when TCNT starts counting up from H'00 until
Bit 1
CKS1
0
1
0
1
11.2.3, Reset Control/Status Register (RSTCSR).
overflow occurs.
Description
Interval timer: Sends the CPU an interval timer interrupt request (WOVI)
when TCNT overflows
Watchdog timer: Generates the WDTOVF signal *
Description
TCNT is initialized to H'00 and halted
TCNT counts
Bit 0
CKS0
0
1
0
1
0
1
0
1
Clock
Description
/2 (initial value)
/64
/128
/512
/2048
/8192
/32768
/131072
Overflow Period (when
25.6 µs
819.2 µs
1.6 ms
6.6 ms
26.2 ms
104.9 ms
419.4 ms
1.68 s
1
when TCNT overflows *
= 20 MHz) *
(Initial value)
(Initial value)
2