HD6473937RXV Renesas Electronics America, HD6473937RXV Datasheet - Page 325

• Manufacturer Part Number: HD6473937RXV
• Description: MCU 3/5V 60K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD6473937RXV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 59
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Consequently, the receive margin in asynchronous mode can be expressed as shown in equation
(1).
M ={(0.5 –
where
M: Receive margin (%)
N: Ratio of bit rate to clock (N = 16)
D: Clock duty (D = 0.5 to 1.0)
L: Frame length (L = 9 to 12)
F: Absolute value of clock frequency deviation
Substituting 0 for F (absolute value of clock frequency deviation) and 0.5 for D (clock duty) in
equation (1), a receive margin of 46.875% is given by equation (2).
When D = 0.5 and F = 0,
M = {0.5 — 1/(2 16)} 100 [%]
However, this is only a computed value, and a margin of 20% to 30% should be allowed when
carrying out system design.
Internal
basic clock
Receive data
(RXD3x)
Synchronization
sampling timing
Data sampling
timing
= 46.875%
2N
Figure 10-23 Receive Data Sampling Timing in Asynchronous Mode
1
) –
D – 0.5
0
N
8 clock pulses
Start bit
– (L – 0.5) F} 5 100 [%]
16 clock pulses
7
..... Equation (2)
15 0
..... Equation (1)
D0
7
15 0
D1
311