UPD78F1211GB-GAF-AX Renesas Electronics America, UPD78F1211GB-GAF-AX Datasheet - Page 842

• Manufacturer Part Number: UPD78F1211GB-GAF-AX
• Description: MCU 16BIT 78K0R/LX3 44-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Ix3r

Specifications of UPD78F1211GB-GAF-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

840
(2) Multiplication/division data register B (MDBL, MDBH)
Address: FFFF6H, FFFF7H, FFFF4H, FFFF5H
Symbol
MDBH
Symbol
MDBL
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 following table shows the functions of MDBH and MDBL during operation execution.
Remark
DIVMODE
0
1
MDBH
MDBL
15
15
Figure 15-3. Format of Multiplication/Division Data Register B (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
MDBH
MDBL
Table 15-3. Functions of MDBH and MDBL During Operation Execution
the multiplication/division control register (MDUC) is 81H). The operation result will be an
undefined value.
result will be an undefined value.
14
14
Multiplication mode
Division mode
MDBH
MDBL
13
13
Operation Mode
MDBH
MDBL
12
12
FFFF5H
FFFF7H
MDBH
MDBL
CHAPTER 15 MULTIPLIER/DIVIDER
11
11
MDBH
User’s Manual U19678EJ1V1UD
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
8
8
Setting
MDBH
−
MDBL
7
7
MDBH
MDBL
6
6
MDBH
MDBL
5
5
MDBH: Multiplication result (product)
MDBL: Multiplication result (product)
MDBH
MDBL
FFFF4H
4
FFFF6H
4
MDBHL
MDBH
Higher 16 bits
Lower 16 bits
Operation Result
3
3
MDBH
MDBL
2
2
−
MDBH
MDBL
1
1
MDBH
MDBL
0
0