UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 225

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.4 Multiplier Operation
operation timing of the multiplier where MRA0 is set to AAH and MRB0 is set to D3H.
3-bit counter
The multiplier of the 78K0S/KB1+ can execute the calculation of 8 bits
<1> Counting is started by setting the MULST0, and then multiplication of MRA0 and MRB0 begins. The
<2> The data generated by the selector is added to the data of MUL0 at each CPU clock, and the counter value is
<3> When the 3-bit counter value is 111B, MULST0 is cleared and the operation is stopped. At this time, MUL0
Remark
Note Mid-calculation results are read by referencing MUL0 while calculating.
The source code of this example is shown in the following page.
CPU clock
MULST0
MRA0
MRB0
MUL0
multiplication result is held after 16 clocks, using the CPU clock.
incremented by one.
holds the operation result.
When MULST0 is low, the 3-bit counter is cleared.
Figure 12-3. Multiplier Operation Timing (Example of AAH
000B
AA
D3
<1>
CHAPTER 12 MULTIPLIER
1
User’s Manual U17446EJ5V0UD
2
<2>
3
001B
4
5
010B
Operation in progress
6
7
011B
8
9 10 11 12 13 14 15 16
100B
8 bits = 16 bits. Figure 12-3 shows the
Note
101B
D3H)
110B
111B
<3>
8C1E
000B
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