HD64F3067RF20 Renesas Electronics America, HD64F3067RF20 Datasheet - Page 71

• Manufacturer Part Number: HD64F3067RF20
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3067RF20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• 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
• Package: 100PQFP
• Family Name: H8
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 70
• Interface Type: SCI
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Number Of Timers: 7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Before Execution of BCLR Instruction
Execution of BCLR Instruction
BCLR #0, @P4DDR ;Clear bit 0 in data direction register
After Execution of BCLR Instruction
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
The BCLR instruction can be used to clear flags in the on-chip registers to 0. In an interrupt-
handling routine, for example, if it is known that the flag is set to 1, it is not necessary to read the
flag ahead of time.
Input/output
DDR
Input/output
DDR
0
DDR is cleared to 0, making P4
P4
Input
0
P4
Output
1
7
7
7
and P4
P4
Input
0
P4
1
Output
6
6
6
output pins.
P4
Output
1
P4
Output
1
5
5
P4
Output
1
P4
Output
1
0
an input pin. In addition, P4
4
4
P4
Output
1
P4
Output
1
Rev. 4.00 Jan 26, 2006 page 47 of 938
3
3
P4
Output
1
P4
Output
1
2
2
7
P4
Output
1
P4
Output
1
DDR and P4
REJ09B0276-0400
1
1
Section 2 CPU
P4
Output
1
P4
Input
0
6
0
0
DDR