DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 471

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 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: Lead free / RoHS Compliant
• Eeprom Size: -

12.1.4
Table 12.2 summarizes the WDT registers.
Table 12.2 WDT Registers
Write *
H'FFA8
H'FFAA
Notes: 1. Lower 16 bits of the address.
12.2
12.2.1
TCNT is an 8-bit readable and writable * up-counter.
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
Bit
Initial value
Read/Write
Address *
2
2. Write word data starting at this address.
3. Only 0 can be written in bit 7, to clear the flag.
Register Configuration
Register Descriptions
Timer Counter (TCNT)
Register Rewriting.
Read
H'FFA8
H'FFA9
H'FFAB
1
R/W
7
0
Name
Timer control/status register
Timer counter
Reset control/status register
R/W
6
0
R/W
5
0
R/W
4
0
Rev. 3.00 Sep 27, 2006 page 443 of 872
R/W
3
0
Abbre-
viation
TCSR
TCNT
RSTCSR
R/W
Section 12 Watchdog Timer
2
0
R/W
R/(W) *
R/W
R/(W) *
R/W
REJ09B0325-0300
1
0
3
3
Initial
Value
H'18
H'00
H'3F
R/W
0
0