DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 459

• Manufacturer Part Number: DF2148ATE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148ATE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148ATE20; HD64F2148ATE20

TCSR0 Bit 4—Reset Select (RSTS): Reserved. This bit should not be set to 1.
TCSR1 Bit 4—Prescaler Select (PSS): Selects the input clock source for TCNT in WDT1. For
details, see the description of the CKS2 to CKS0 bits below.
Bit 3—Reset or NMI (RST/NMI
requested on TCNT overflow in watchdog timer mode.
Bits 2 to 0—Clock Select 2 to 0 (CKS2 to CKS0): These bits select an internal clock source,
obtained by dividing the system clock ( ), or subclock ( SUB) for input to TCNT.
Note:
WDT1 TCSR
Bit 4
PSS
0
1
Bit 3
RST/NMI
0
1
Bit 2
CKS2
0
1
WDT0 input clock selection
NMI
NMI
NMI
* The overflow period is the time from when TCNT starts counting up from H'00 until
Bit 1
CKS1
0
1
0
1
overflow occurs.
Description
TCNT counts -based prescaler (PSM) divided clock pulses
TCNT counts SUB-based prescaler (PSS) divided clock pulses
Description
An NMI interrupt is requested
An internal reset is requested
Bit 0
CKS0
0
1
0
1
0
1
0
1
NMI
NMI
NMI): Specifies whether an internal reset or NMI interrupt is
Clock
/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
Rev. 4.00 Sep 27, 2006 page 413 of 1130
Description
Section 14 Watchdog Timer (WDT)
REJ09B0327-0400
= 20 MHz)
(Initial value)
(Initial value)