DF36912GFH Renesas Electronics America, DF36912GFH Datasheet - Page 74

• Manufacturer Part Number: DF36912GFH
• Description: MCU 3/5V 8K 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H Tinyr

Specifications of DF36912GFH

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 12MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 2 CPU
(2)
Example 3: BCLR instruction executed designating port 5 control register PCR5
P57 and P56 are input pins, with a low-level signal input at P57 and a high-level signal input at
P56. P55 to P50 are output pins that output low-level signals. An example of setting the P50 pin as
an input pin by the BCLR instruction is shown below. It is assumed that a high-level signal will be
input to this input pin.
[BCLR instruction executed]
[After executing BCLR]
[Description on operation]
1. When the BCLR instruction is executed, first the CPU reads PCR5. Since PCR5 is a write-only
2. Next, the CPU clears bit 0 in the read data to 0, changing the data to H'FE.
3. Finally, H'FE is written to PCR5 and BCLR instruction execution ends.
Rev. 3.00 Sep. 14, 2006 Page 44 of 408
REJ09B0105-0300
Input/output
Pin state
PCR5
PDR5
BCLR
Input/output
Pin state
PCR5
PDR5
[Prior to executing BCLR]
register, the CPU reads a value of H'FF, even though the PCR5 value is actually H'3F.
Bit Manipulation in a Register Containing a Write-Only Bit
#0,
P57
Input
Low
level
0
1
P57
Output
Low
level
1
1
@PCR5
P56
Input
High
level
0
0
P56
Output
High
level
1
0
P55
Output
Low
level
1
0
P55
Output
Low
level
1
0
The BCLR instruction is executed for PCR5.
P54
Output
Low
level
1
0
P54
Output
Low
level
1
0
P53
1
0
P53
0
Output
Low
level
Output
Low
level
1
P52
Output
Low
level
1
0
P52
Output
Low
level
1
0
P51
Output
Low
level
1
0
P51
Output
Low
level
1
0
P50
Output
Low
level
1
0
P50
Input
High
level
0
0