DF2148BFA20 Renesas Electronics America, DF2148BFA20 Datasheet - Page 326

• Manufacturer Part Number: DF2148BFA20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BFA20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148BFA20; HD64F2148BFA20

Section 3 Processing States
3.2
When the RES input goes low all current processing stops and the CPU enters 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 the relevant
microcontroller hardware manual.
Rev. 4.00 Feb 24, 2006 page 310 of 322
REJ09B0139-0400
Notes: 1.
RES = high
Exception-handling state
Reset State
2.
Bus-released state
From any state except hardware standby mode, a transition to the reset state occurs whenever RES
goes low.
From any state, a transition to hardware standby mode occurs when STBY goes low.
Reset state
End of bus
request
End of
exception
handling
*1
Bus
request
Figure 3.2 State Transitions
STBY = high, RES = low
External interrupt
Request for
exception
handling
Program execution
End of bus request
Bus request
state
Interrupt
request
SLEEP
instruction
with
SSBY = 1
Hardware standby mode
SLEEP
instruction
with
SSBY = 0
Software standby mode
Power-down state
Sleep mode
*2