SH7261 datasheet(790/1348 Pages) RENESAS

790 / 1348 page

Section 17 I

2C Bus Interface 3 (IIC3)

Rev. 2.00 Sep. 07, 2007 Page 758 of 1312

REJ09B0320-0200

(2)

Transmit Operation

In transmit mode, transmit data is output from SDA, in synchronization with the fall of the transfer

clock. The transfer clock is output when MST in ICCR1 is 1, and is input when MST is 0. For

transmit mode operation timing, refer to figure 17.14. The transmission procedure and operations

in transmit mode are described below.

1. Set the ICE bit in ICCR1 to 1. Set the MST and CKS[3:0] bits in ICCR1. (Initial setting)

2. Set the TRS bit in ICCR1 to select the transmit mode. Then, TDRE in ICSR is set.

3. Confirm that TDRE has been set. Then, write the transmit data to ICDRT. The data is

transferred from ICDRT to ICDRS, and TDRE is set automatically. The continuous

transmission is performed by writing data to ICDRT every time TDRE is set. When changing

from transmit mode to receive mode, clear TRS while TDRE is 1.

SCL

TRS

TDRE

ICDRT

ICDRS

Bit 0

Data 1

Data 2

Data 3

Data 2

Bit 6

Bit 7

Bit 0

Bit 6

Bit 7

Bit 0

Bit 1

SDA

(Output)

User

processing

[3] Write data

to ICDRT

[3] Write data

to ICDRT

[3] Write data

to ICDRT

[3] Write data

to ICDRT

[2] Set TRS

Figure 17.14 Transmit Mode Operation Timing

SH7261 Datasheet(PDF) 790 Page - Renesas Technology Corp

SH7261 Datasheet(HTML) 790 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