HD64F2149YV datasheet(540/1075 Pages) RENESAS

540 / 1075 page

Section 16 I

2C Bus Interface

Rev. 3.00 Jan 18, 2006 page 512 of 1044

REJ09B0280-0300

When, with the I

2C bus format selected, IRIC is set to 1 and an interrupt is generated, other flags

must be checked in order to identify the source that set IRIC to 1. Although each source has a

corresponding flag, caution is needed at the end of a transfer.

When the TDRE or RDRF internal flag is set, the readable IRTR flag may or may not be set. The

IRTR flag (the DTC start request flag) is not set at the end of a data transfer up to detection of a

retransmission start condition or stop condition after a slave address (SVA) or general call address

match in I

2C bus format slave mode.

Even when the IRIC flag and IRTR flag are set, the TDRE or RDRF internal flag may not be set.

The IRIC and IRTR flags are not cleared at the end of the specified number of transfers in

continuous transfer using the DTC. The TDRE or RDRF flag is cleared, however, since the

specified number of ICDR reads or writes have been completed.

Table 16.3 shows the relationship between the flags and the transfer states.

Table 16.3

Flags and Transfer States

MST

TRS

BBSY

ESTP

STOP

IRTR

AASX

AAS

ADZ

ACKB

State

1/0

000000

Idle state (flag

clearing required)

000000

Start condition

issuance

100100

Start condition

established

1/0

100000

0/1

Master mode wait

1/0

100100

0/1

Master mode

transmit/receive end

10001/0

1/0

Arbitration lost

100000

SAR match by first

frame in slave mode

100000

General call address

match

100010

SARX match

1/0

100000

0/1

Slave mode

transmit/receive end

(except after SARX

match)

1/0

Slave mode

transmit/receive end

(after SARX match)

1/0

0/1

Stop condition

detected

HD64F2149YV Folha de dados(PDF) 540 Page - Renesas Technology Corp

HD64F2149YV Folha de dados(HTML) 540 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

Folha de dados Download

Ligação URL