UPD70F3451GC-UBT-A Renesas Electronics America, UPD70F3451GC-UBT-A Datasheet - Page 793

• 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: -

Therefore, the maximum baud rate that can be received at the transfer destination is as follows.
Similarly, the maximum allowable value can be obtained as follows.
Therefore, the minimum baud rate that can be received at the transfer destination is as follows.
The allowable baud rate error of UARTB and the transfer destination can be obtained as follows from the
expressions described above for computing the minimum and maximum baud rate values.
Remarks 1.
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65535
Division Ratio (k)
2.
The reception precision depends on the number of bits in one frame, the base clock
frequency, and the division ratio (k). The higher the base clock frequency and the larger the
division ratio (k), the higher the precision.
k: UBCTL2 set value
Table 15-6. Maximum and Minimum Allowable Baud Rate Error
CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE B (UARTB)
Maximum Allowable Baud Rate Error
10
11
×
BRmax
BRmin
FLmax
FLmax
User’s Manual U18279EJ3V0UD
=
+2.33 %
+3.53 %
+4.14 %
+4.45 %
+4.61 %
+4.68 %
+4.72 %
+4.74 %
+4.75 %
+4.76 %
+4.76 %
+4.76 %
+4.76 %
+4.76 %
+4.76 %
=
=
=
(FLmax/11)
(FLmin/11)
11
21
×
20
k
FL
−
k
2
−
FL
−
−
1
k
1
2
=
=
×
+
×
11
k
2
21k
21k
20
22
×
FL
−
+
k
k
2
2
=
Minimum Allowable Baud Rate Error
Brate
Brate
21
2
k
×
−
k
2
FL
−2.44
−3.61
−4.19
−4.48
−4.62
−4.69
−4.73
−4.74
−4.75
−4.76
−4.76
−4.76
−4.76
−4.76
−4.76
791