HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 386

• Manufacturer Part Number: HD64F38024DV
• Description: IC H8/SLP MCU FLASH 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD64F38024DV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: LCD, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

void set_vbr(void* vbr)
Description:
Header:
Parameters:
Example:
long mac(long val,int *ptr1,int *ptr2,unsigned long count)
long macl(long val,int *ptr1,int *ptr2,unsigned long count,unsigned long mask)
Description:
Header:
Return value:
Parameters:
372
Sets vbr (32 bits) to the vector base register (VBR). This function can be
used when the CPU type is H8SXN, H8SXM, H8SXA, or H8SXX.
<machine.h>
vbr
#include <machine.h> /* Be sure to include <machine.h> */
void main(void)
{
set_vbr((void*)0x20000);
*/
}
Expanded to the multiply-and-accumulate instruction, MAC.
The function mac sets parameter val to the MAC register as the initial value,
multiplies two bytes ptr1 and ptr2 with sign, adds the 4-byte result to the
MAC register contents, and adds two to ptr1 and ptr2. This operation is
repeated for the number of times specified by count.
The macl function logically ANDs the values of ptr2 and mask so that the
data of ptr2 can be used as a ring buffer.
These functions can be used in H8SXN:{M | MD}, H8SXM:{M | MD}
H8SXA:{M | MD}, H8SXX:{M | MD}, 2600a and 2600n CPU/operating
modes.
<machine.h>
Result of multiply-and-accumulate operation
val
ptr1, ptr2
count
mask
Setting value
Initial value of the MAC register
Pointer to the multiplication data
Number of loops
Mask value for the ring buffer
/* Sets 0x20000 to VBR