HD6432670 Hitachi, HD6432670 Datasheet - Page 340

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

One address is specified by MAR, and the other is set automatically to the data transfer
acknowledge pin (
Table 7.8 summarizes register functions in single address mode.
Table 7.8
Register
MAR specifies the start address of the transfer source or transfer destination as 24 bits. IOAR is
invalid; in its place the strobe for external devices (
Figure 7.9 illustrates operation in single address mode (when sequential mode is specified).
Rev. 2.0, 04/02, page 294 of 906
23
15
Register Functions in Single Address Mode
ETCR
MAR
pin
0
). The transfer direction can be specified by the DTDIR bit in DMACR.
0
DTDIR = 0 DTDIR = 1 Initial Setting
Source
address
register
Write
strobe
Transfer counter
Function
Destination
address
register
Read
strobe
Start address of
transfer destination
or transfer source
(Set automatically
by SAE bit; IOAR is
invalid)
Number of transfers See sections 7.5.2,
) is output.
Operation
See sections 7.5.2,
Sequential Mode,
7.5.3, Idle Mode,
and 7.5.4, Repeat
Mode.
Strobe for external
device
Sequential Mode,
7.5.3, Idle Mode,
and 7.5.4, Repeat
Mode.