H8S2245 datasheet(22/818 Pages) RENESAS

22 / 818 page

Rev.3.00 Mar. 26, 2007 Page xxii of xlii

REJ09B0355-0300

Item

Page Revision (See Manual for Details)

13.4 Usage Notes

500

Retransfer Operation

Description amended

• Retransfer operation when SCI is in receive mode

[4] ... If DTC data transfer by an RXI source is enabled, the

contents of RDR can be read automatically. When the RDR data

is read by the DTC, the RDRF flag is automatically cleared to 0 if

DISEL in DTC is 0 and the transfer counter value is not 0.

501

• Retransfer operation when SCI is in transmit mode

[9] ... If DTC data transfer by an RXI source is enabled, the

contents of RDR can be read automatically. When data is written

to TDR by the DTC, the TDRE bit is automatically cleared to 0 if

DISEL in DTC is 0 and the transfer counter value is not 0.

14.1.1 Features

503

• High-speed conversion

Description amended

 Minimum conversion time: 6.5 µs per channel (at 20-MHz

operation)

14.2.2 A/D

Control/Status Register

(ADCSR)

508

Bit 7

A/D End Flag (ADF)

Note

* added

[Clearing conditions]

• When 0 is written to ...

• When the DTC* is activated by a ADI interrupt and ADDR is

read

Note:

* The flag is cleared only when DISEL in DTC is 0 and the

transfer counter value is not 0.

509

Bit 3

Clock Select (CKS)

Description added

... is stopped (ADST = 0). Set the conversion time to a value

equal to or greater than the conversion time indicated in section

19.5, A/D Conversion Characteristics.

14.4.1 Single Mode

(SCAN = 0)

Figure 14.3 Example of

A/D Converter Operation

(Single Mode, Channel 1

Selected)

514

Note

* added to figure 14.3

Read conversion result

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