UPD70F3451GC-UBT-A Renesas Electronics America, UPD70F3451GC-UBT-A Datasheet - Page 789

• Manufacturer Part Number: UPD70F3451GC-UBT-A
• Description: MCU 32BIT 128KB FLASH 80LQFP
• Manufacturer: Renesas Electronics America
• Series: V850E/Ix3r

Specifications of UPD70F3451GC-UBT-A

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: CSI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 5.5 V
• Data Converters: A/D 10x12b, 4x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(2) Serial clock generation
A serial clock can be generated according to the settings of the UBCTL2 register.
The 16-bit counter divisor value can be selected according to the UBCTL2.UBBRS15 to UBCTL2.UBBRS0
bits.
(a) Baud rate
(b) Baud rate error
Cautions 1. Make sure that the baud rate error during transmission does not exceed the
The baud rate is the value obtained according to the following formula.
The baud rate error is obtained according to the following formula.
Example: Base clock (f
Base clock frequency = f
k = Value set according to UBCTL2.UBBRS15 to UBCTL2.UBBRS0 bits (k = 4, 5, 6, ..., 65535)
2. Make sure that the baud rate error during reception is within the allowable baud rate
allowable error of the reception destination.
range during reception, which is described in paragraph (4).
Error
Settings of UBCTL2.UBBRS15 to UBCTL2.UBBRS0 bits = 0000000001100110B
Target baud rate = 312500 bps
Baud rate = 64 M/(2 × 102)
Error = (313725/312500 − 1) × 100
When base clock (f
CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE B (UARTB)
(%)
= 0.392 [%]
=
= 64000000/(2 × 102) = 313725 [bps]
⎛
⎜ ⎜
⎝
XX
XX
Actual
Baud
Desired
) = 64 MHz = 64,000,000 Hz
XX
rate
baud
User’s Manual U18279EJ3V0UD
) = 60 MHz and k = 96, the error is 0%.
baud
=
rate
Base
rate
(baud
clock
(normal
2
×
rate
frequency
k
baud
with
error)
rate)
[bps]
−
1
⎞
⎟ ⎟
⎠
×
(k = 102)
100
[%]
787