UPD78F0551MA-FAA-AX Renesas Electronics America, UPD78F0551MA-FAA-AX Datasheet - Page 498

• Manufacturer Part Number: UPD78F0551MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0551MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2-L
(4) Permissible baud rate range during reception
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
The permissible error from the baud rate at the transmission destination during reception is shown below.
Caution Make sure that the baud rate error during reception is within the permissible error range, by using
As shown in Figure 14-27, the latch timing of the receive data is determined by the counter set by baud rate generator
control register 6 (BRGC6) after the start bit has been detected. If the last data (stop bit) meets this latch timing, the
data can be correctly received.
Assuming that 11-bit data is received, the theoretical values can be calculated as follows.
FL = (Brate)
Maximum permissible
Minimum permissible
Brate: Baud rate of UART6
k:
FL:
Margin of latch timing: 2 clocks
Data frame length
data frame length
data frame length
the calculation expression shown below.
Set value of BRGC6
1-bit data length
of UART6
−
1
Figure 14-27. Permissible Baud Rate Range During Reception
Latch timing
Start bit
Start bit
Start bit
Bit 0
Bit 0
FL
Bit 0
Bit 1
Bit 1
Bit 1
1 data frame (11
FLmin
CHAPTER 14 SERIAL INTERFACE UART6
FLmax
Bit 7
Bit 7
FL)
Bit 7
Parity bit
Parity bit
Parity bit
Stop bit
Stop bit
Stop bit
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