DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 90

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

2.9
2.9.1
The BSET, BCLR, BNOT, BST, and BIST instructions are used to read data in bytes, operate the
data in bit units, and write the result of the bit unit operation in bits again. Therefore, special care
is necessary to use these instructions for the registers and the ports that include write-only bit.
The BCLR instruction can be used to clear the flags in the internal I/O registers to 0. In this time,
if it is obvious that the flag has been set to 1 in the interrupt handler, there is no need to read the
flag beforehand.
Rev.2.00 May. 28, 2009 Page 50 of 732
REJ09B0059-0200
Notes: 1. From any state except hardware standby mode, a transition to the reset state occurs whenever
2. In every state, when the STBY pin becomes low, the hardware standby mode is entered.
3. For details, refer to section 22, Power-Down Modes.
A transition can also be made to the reset state when the watchdog timer overflows.
Usage Note
Usage Notes on Bit-Wise Operation Instructions
Bus-released state
handling state
Reset state
Reset state
Exception
*1
= High
Figure 2.13 State Transitions
External interrupt request
Program execution state
End of bus request
Bus request
= Low
= High,
Hardware standby
Software standby
Power down state
Sleep mode
mode
mode
*2
*3
goes low.