HD64F3437STF16V Renesas Electronics America, HD64F3437STF16V Datasheet - Page 73

• Manufacturer Part Number: HD64F3437STF16V
• Description: MCU 3/5V 60K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300r

Specifications of HD64F3437STF16V

• Core Processor: H8/300
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: Host Interface, I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Before Execution of BCLR Instruction
Input/output
Pin state
DDR
DR
Execution of BCLR Instruction
BCLR
After Execution of BCLR Instruction
Input/output
Pin state
DDR
DR
Explanation: To execute the BCLR instruction, the CPU begins by reading P4DDR. Since
P4DDR is a write-only register, it is read as H'FF, even though its true value is H'3F.
Next the CPU clears bit 0 of the read data, changing the value to H'FE.
Finally, the CPU writes this value (H'FE) back to P4DDR to complete the BCLR instruction.
As a result, P4
are set to 1, making P4
#0, @P4DDR
0
DDR is cleared to 0, making P4
P4
Input
Low
0
1
P4
Output
Low
1
1
7
7
7
and P4
P4
Input
High
0
0
P4
Output
High
1
0
; clear bit 0 in data direction register
6
6
6
output pins.
P4
Output
Low
1
0
P4
Output
Low
1
0
5
5
0
P4
Output
Low
1
0
P4
Output
Low
1
0
an input pin. In addition, P4
4
4
P4
Output
Low
1
0
P4
Output
Low
1
0
3
3
P4
Output
Low
1
0
P4
Output
Low
1
0
2
2
7
DDR and P4
P4
Output
Low
1
0
P4
Output
Low
1
0
1
1
P4
Output
Low
1
0
P4
Input
High
0
0
6
DDR
0
0
41