DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 120

• 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

Section 2 CPU
2.8.2
When the RES input goes low all current processing stops and the CPU enters the reset state. All
interrupts are disabled in the reset state. Reset exception handling starts when the RES signal
changes from low to high.
The reset state can also be entered by a watchdog timer overflow. For details, refer to section 14,
Watchdog Timer (WDT).
Rev. 4.00 Sep 27, 2006 page 74 of 1130
REJ09B0327-0400
Notes: 1.
RES = high
Exception-handling state
Reset State
2.
3.
Bus-released state
From any state except hardware standby mode, a transition to the reset state occurs whenever RES
goes low. A transition can also be made to the reset state when the watchdog timer overflows.
From any state, a transition to hardware standby mode occurs when STBY goes low.
The power-down state also includes a watch mode, subactive mode, subsleep mode, etc. For details,
refer to section 25, Power-Down State.
Reset state *
End of bus
request
End of
exception
handling
1
Figure 2.15 State Transitions
Bus
request
STBY = high, RES = low
External interrupt
Request for
exception
handling
Program execution
End of bus request
Bus request
state
Interrupt
request
SLEEP
instruction
with
LSON = 0,
PSS = 0,
SSBY = 1
SLEEP
instruction
with
LSON = 0,
SSBY = 0
Hardware standby mode *
Software standby mode
Power-down state *
Sleep mode
3
2