HD6432142 datasheet(235/1177 Pages) RENESAS

235 / 1177 page

Section 7 Data Transfer Controller (DTC)

Rev. 4.00 Sep 27, 2006 page 191 of 1130

REJ09B0327-0400

Table 7.2

DTC Functions

Address Registers

Transfer Mode

Activation Source

Transfer

Source

Transfer

Destination

• Normal mode

 One transfer request transfers one

byte or one word

 Memory addresses are incremented

or decremented by 1 or 2

 Up to 65,536 transfers possible

• Repeat mode

 One transfer request transfers one

byte or one word

 Memory addresses are incremented

or decremented by 1 or 2

 After the specified number of transfers

(1 to 256), the initial state resumes and

operation continues

• Block transfer mode

 One transfer request transfers a block

of the specified size

 Block size is from 1 to 256 bytes or

words

 Up to 65,536 transfers possible

 A block area can be designated at either

the source or destination

• IRQ

• FRT ICI, OCI

• 8-bit timer CMI

• Host interface IBF

• SCI TXI or RXI

• A/D converter ADI

• IIC IICI

• Software

24 bits

7.3.2

Activation Sources

The DTC operates when activated by an interrupt or by a write to DTVECR by software (software

activation). An interrupt request can be directed to the CPU or DTC, as designated by the

corresponding DTCER bit. The interrupt request is directed to the DTC when the corresponding

bit is set to 1, and to the CPU when the bit is cleared to 0.

At the end of one data transfer (or the last of the consecutive transfers in the case of chain transfer)

the interrupt source or the corresponding DTCER bit is cleared. Table 7.3 shows activation

sources and DTCER clearing.

HD6432142 Scheda tecnica(PDF) 235 Page - Renesas Technology Corp

HD6432142 Scheda tecnica(HTML) 235 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

Scheda tecnica Scarica

Link URL