HD6432670 Hitachi, HD6432670 Datasheet - Page 460

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.7.4
An example is shown in which the DTC is used to transfer a block of 128 bytes of data by means
of software activation. The transfer source address is H'1000 and the destination address is
H'2000. The vector number is H'60, so the vector address is H'04C0.
1. Set MRA to incrementing source address (SM1 = 1, SM0 = 0), incrementing destination
2. Set the start address of the register information at the DTC vector address (H'04C0).
3. Check that the SWDTE bit in DTVECR is 0. Check that there is currently no transfer activated
4. Write 1 to the SWDTE bit and the vector number (H'60) to DTVECR. The write data is H'E0.
Rev. 2.0, 04/02, page 414 of 906
address (DM1 = 1, DM0 = 0), block transfer mode (MD1 = 1, MD0 = 0), and byte size (Sz =
0). The DTS bit can have any value. Set MRB for one block transfer by one interrupt (CHNE =
0). Set the transfer source address (H'1000) in SAR, the destination address (H'2000) in DAR,
and 128 (H'8080) in CRA. Set 1 (H'0001) in CRB.
by software.
Software Activation
transfer register
transfer register
Second data
information
information
First data
Figure 9.12 Chain Transfer when Counter = 0
Chain transfer
(counter = 0)
Input circuit
Upper 8 bits
Input buffer
of DAR