HD6432670 Hitachi, HD6432670 Datasheet - Page 287

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

Table 6.11 shows whether there is an idle cycle insertion or not in the case of mixed accesses to
normal space and DRAM space/continuous synchronous DRAM space.
Figure 6.80 Example of Idle Cycle Operation after Continuous Synchronous DRAM Space
DQMU, DQML
Precharge-sel
Address bus
Data bus
,
CKE
Write Access (IDLC = 0, ICIS1 = 0, SDWCD = 1, CAS Latency 2)
ø
PALL ACTV
Column
address
T
Continuous synchronous
DRAM space write
p
address
address
Row
Row
T
r
NOP WRIT
T
c1
address
Column
T
c2
Idle cycle
T
i
External space read
External address
External address
T
1
High
NOP
T
2
Rev. 2.0, 04/02, page 241 of 906
T
3
READ
Continuous synchronous
DRAM space read
T
Column address 2
c1
T
Cl
NOP
T
c2