D13007VX13V Renesas Electronics America, D13007VX13V Datasheet - Page 73
D13007VX13V
Manufacturer Part Number
D13007VX13V
Description
MCU 3V 0K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Hr
Specifications of D13007VX13V
Core Processor
H8/300H
Core Size
16-Bit
Speed
13MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
35
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 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
-
Program Memory Size
-
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Before Execution of BCLR Instruction
Input/output
DDR
Execution of BCLR Instruction
BCLR
After Execution of BCLR Instruction
Input/output
DDR
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 the case of the
IRQ status register (ISR), for example, a flag must be read as a condition for clearing it, but when
using the BCLR instruction, if it is known that a flag has been set to 1 in an interrupt-handling
routine, for instance, it is not necessary to read the flag ahead of time.
#0, @P4DDR
0
DDR is cleared to 0, making P4
P4
Input
0
P4
Output
1
7
7
7
and P4
P4
Input
0
P4
Output
1
6
6
; Execute BCLR instruction on DDR
6
output pins.
Output
P4
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.5.00 Sep. 12, 2007 Page 43 of 764
3
3
P4
Output
1
P4
Output
1
2
2
7
P4
Output
1
P4
Output
1
DDR and P4
REJ09B0396-0500
1
1
P4
Output
1
P4
Input
0
2. CPU
6
0
0
DDR
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