HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 256
HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412373R.pdf
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Section 6 Bus Controller (BSC)
6.5.5
The read strobe (RD) timing can be changed for individual areas by setting bits RDN7 to RDN0 to
1 in RDNCR. Figure 6.19 shows an example of the timing when the read strobe timing is changed
in basic bus 3-state access space.
When the DMAC or EXDMAC is used in single address mode, note that if the RD timing is
changed by setting RDNn to 1, the RD timing will change relative to the rise of DACK or
EDACK.
Rev.7.00 Mar. 18, 2009 page 188 of 1136
REJ09B0109-0700
Read
Write
Notes: 1. Downward arrows indicate the timing of WAIT pin sampling.
Read Strobe (RD) Timing
2. When RDN = 0
φ
WAIT
Address bus
AS
RD
Data bus
HWR, LWR
Data bus
Figure 6.18 Example of Wait State Insertion Timing
T
1
By program wait
T
2
T
w
Write data
T
By WAIT pin
w
T
w
Read data
T
3
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