HD6473937RXV Renesas Electronics America, HD6473937RXV Datasheet - Page 97

• Manufacturer Part Number: HD6473937RXV
• Description: MCU 3/5V 60K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD6473937RXV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 59
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• 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: -

3.4.3
Either of the following methods should be used for flag clearing in the interrupt request registers
(IRR1, IRR2, IWPR).
Method 1
Clear the interrupt request flag with a BCLR instruction. (Recommended method)
Sample coding for clearing IRRI1 (bit 1 of IRR1):
BCLR #1,@IRR1:8
Method 2
Write data to the interrupt request register with 0 for the relevant interrupt request flag and 1s for
the other flags. (Faster execution than Method 1)
Sample coding for clearing IRRI1 (bit 1 of IRR1):
MOV.B #B'11111101,R1L
MOV.B R1L,@IRR1:8
Figure 3-7 Port Mode Register Setting and Interrupt Request Flag Clearing Procedure
Notes on Interrupt Request Flag Clearing Methods
Clear interrupt request flag to 0
Set port mode register bit
Execute NOP instruction
CCR I bit
CCR I bit
1
0
Interrupts masked. (Another possibility
is to disable the relevant interrupt in
interrupt enable register 1.)
After setting the port mode register bit,
first execute at least one instruction
(e.g., NOP), then clear the interrupt
request flag to 0
Interrupt mask cleared
83