SH7721 datasheet(1073/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

1073 / 1524 page

Section 30

SIM Card Module (SIM)

Rev. 3.00 Jan. 18, 2008 Page 1011 of 1458

REJ09B0033-0300

30.4.4

Clocks

Only the internal clock generated by the on-chip baud rate generator can be used as the

transmit/receive clock in the smart card interface. The bit rate is set using the bit rate register

(SCBRR) and the sampling register (SCSMPL), using the formula indicated below. Examples of

bit rates are listed in table 30.3

Here, when the CKE0 bit is set to 1 and the clock output is selected, a clock signal is output from

the SIM_CLK pin with frequency equal to (SCSMPL + 1) times the bit rate.

B = P

φ × 106/{(S+1) × 2 (N+1)}

where

B = Bit rate (bits/s)

φ = Operating frequency of the peripheral module

S = SCSMPL setting (0

≤ S ≤ 2047)

N = SCBRR setting (0

≤ N ≤ 7).

Table 30.3

Example of Bit Rates (bits/s) for SCBRR Settings

φ = 19.8 MHz, SCSMPL = 371)

SCBRR Setting

SCK Frequency (MHz)

Bit Rate (bits/s)

1.2375

3327

1.414

3802

1.65

4435

1.98

5323

2.475

6653

3.3

8871

4.95

13306

9.9

26613

Note:

The bit rate is a value that is rounded off below the decimal point.

SH7721 Datasheet(PDF) 1073 Page - Renesas Technology Corp

SH7721 Datasheet(HTML) 1073 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL