UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 716

• Manufacturer Part Number: UPD78F1506GF-GAT-AX
• Description: MCU 16BIT 78K0R/LX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Lx3r

Specifications of UPD78F1506GF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 78
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Lx3
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
(2) Multiplication/division data register B (MDBL, MDBH)
The MDBH and MDBL registers set the values that are used for multiplication or division operation and store the
operation result. They store the operation result (product) in the multiplication mode and set the divisor data in the
division mode.
MDBH and MDBL can be set by a 16-bit manipulation instruction.
Reset signal generation clears these registers to 0000H.
Cautions 1. Do not rewrite the MDBH and MDBL values during division operation processing (while the
The following table shows the functions of MDBH and MDBL during operation execution.
Remark
Address: FFFF4H, FFFF5H, FFFF6H, FFFF7H
Symbol
MDBH
Symbol
MDBL
DIVMODE
0
1
MDBH
MDBL
DIVMODE: Bit 7 of the multiplication/division control register (MDUC)
2. Do not set MDBH and MDBL to 0000H in the division mode. If they are set, the operation
15
15
Figure 17-3. Format of Multiplication/Division Data Register B (MDBH, MDBL)
multiplication/division control register (MDUC) is 81H).
undefined value.
result will be an undefined value.
MDBH
MDBL
Table 17-3. Functions of MDBH and MDBL During Operation Execution
14
14
Multiplication mode
Division mode
MDBH
MDBL
Operation Mode
13
13
MDBH
MDBL
12
12
FFFF7H
FFFF5H
MDBH
MDBL
11
11
MDBH
MDBL
10
10
After reset: 0000H, 0000H R/W
MDBH: Divisor (higher 16 bits)
MDBL: Dividend (lower 16 bits)
MDBH
MDBL
9
9
MDBH
MDBL
Setting
8
8
−
MDBH
MDBL
7
7
MDBH
MDBL
6
6
CHAPTER 17 MULTIPLIER/DIVIDER
MDBH
MDBL
5
5
MDBH: Multiplication result (product)
MDBL: Multiplication result (product)
The operation result will be an
MDBH
MDBL
FFFF6H
4
FFFF4H
4
Higher 16 bits
Lower 16 bits
MDBHL
Operation Result
MDBH
3
3
MDBH
MDBL
−
2
2
MDBH
MDBL
1
1
MDBH
MDBL
0
0
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