HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 498
HD6413003RVF
Manufacturer Part Number
HD6413003RVF
Description
microcontroller (MCU)
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6413003RVF.pdf
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M = (0.5 –
The receive margin in asynchronous mode can therefore be expressed as in equation (1).
M: Receive margin (%)
N: Ratio of clock frequency to bit rate (N = 16)
D: Clock duty cycle (D = 0 to 1.0)
L: Frame length (L = 9 to 12)
F: Absolute deviation of clock frequency
From equation (1), if F = 0 and D = 0.5 the receive margin is 46.875%, as given by equation (2).
D = 0.5, F = 0
This is a theoretical value. A reasonable margin to allow in system designs is 20% to 30%.
M = | (0.5 –
= 46.875%.................................................................................................(2)
Internal
base clock
Receive data
(RxD)
Synchronization
sampling timing
Data sampling
timing
2 16
Figure 13-21 Receive Data Sampling Timing in Asynchronous Mode
1
2N
1
) – (L – 0.5) F –
)
0
8 clocks
Start bit
16 clocks
| D – 0.5 |
7
N
(1 + F) |
480
15 0
100%
...................(1)
D
0
7
15 0
D
1
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