h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 224

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Data Transfer Controller [H8S/2138 Group]
The DTC transfer mode can be normal mode, repeat mode, or block transfer mode.
The 24-bit SAR designates the DTC transfer source address and the 24-bit DAR designates the
transfer destination address. After each transfer, SAR and DAR are independently incremented,
decremented, or left fixed.
Table 7.2 outlines the functions of the DTC.
Table 7.2
Transfer Mode
Rev. 4.00 Jun 06, 2006 page 170 of 1004
REJ09B0301-0400
Normal mode
Repeat mode
Block transfer 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
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
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
DTC Functions
Activation Source
IRQ
FRT ICI or OCI
8-bit timer CMI
Host interface IBF
SCI TXI or RXI
A/D converter ADI
IIC IICI
Software
Transfer
Source
24 bits
Address Registers
Transfer
Destination
24 bits