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SH7018 Datasheet(PDF) 238 Page - Renesas Technology Corp

Part # SH7018
Description  SuperH??RISC engine
PDF  431 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7018 Datasheet(HTML) 238 Page - Renesas Technology Corp

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The BRR1 setting is calculated as follows:
Asynchronous mode:
N =
× 106 – 1
64
× 22n–1 × B
φ
Clock synchronous mode:
N =
× 106 – 1
8
× 22n–1 × B
φ
B: Bit rate (bit/s)
N: Baud rate generator BRR1 setting (0
≤ N ≤ 255)
φ: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
(See the following table for the clock sources and value of n.)
SMR1 Settings
n
Clock Source
CKS1
CKS2
0
φ
00
1
φ/4
0
1
2
φ/16
1
0
3
φ/64
1
1
The bit rate error in asynchronous mode is calculated as follows:
Error (%) =
– 1
× 100
(N + 1)
× B × 64 × 22n–1
φ × 106



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