UPD70F3745GJ-GAE-AX Renesas Electronics America, UPD70F3745GJ-GAE-AX Datasheet - Page 514

• Manufacturer Part Number: UPD70F3745GJ-GAE-AX
• Description: MCU 32BIT V850ES/JX3 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3r

Specifications of UPD70F3745GJ-GAE-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 128
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 60K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JJ3
R01UH0016EJ0400 Rev.4.00
Sep 30, 2010
Therefore, the maximum baud rate that can be received by the destination is as follows.
Similarly, obtaining the following maximum allowable transfer rate yields the following.
Therefore, the minimum baud rate that can be received by the destination is as follows.
Obtaining the allowable baud rate error for UARTAn and the destination from the above-described equations for
obtaining the minimum and maximum baud rate values yields the following.
Remarks 1. The reception accuracy depends on the bit count in 1 frame, the input clock
10
11
4
8
20
50
100
255
Division Ratio (k)
BRmax = (FLmin/11)
BRmin = (FLmax/11)
× FLmax = 11 × FL −
FLmax =
2. k: Setting value of UAnCTL2.UAnBRS7 to UAnCTL2.UAnBRS0 bits (n = 0 to 3)
frequency, and the division ratio (k). The higher the input clock frequency and
the larger the division ratio (k), the higher the accuracy.
Table 15-4. Maximum/Minimum Allowable Baud Rate Error
21k − 2
20 k
Maximum Allowable Baud Rate Error
−
−
1
1
=
FL × 11
=
CHAPTER 15 ASYNCHRONOUS SERIAL INTERFACE A (UARTA)
k + 2
2 × k
21k − 2
21k + 2
20k
22k
+2.32%
+3.52%
+4.26%
+4.56%
+4.66%
+4.72%
× FL =
Brate
Brate
21k − 2
2 × k
FL
Minimum Allowable Baud Rate Error
−2.43%
−3.61%
−4.30%
−4.58%
−4.67%
−4.72%
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