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Bus Controller (BC)
8-62
8.14 External Memory Space Access (DRAM Space)
8.14.1
DRAM Space
Blocks 1 and 2 can be used as DRAM space by setting the BnDRAM bits in memory control registers 1B/2B and
setting the DRAME bit in DRAM control register. The DRAM bus cycle is always not synchronized the external
clock (but is synchronized with MCLK), and performs address multiplexed output, RAS/CAS signal output, etc.
Note: When common pins are used for addresses and data, DRAM cannot be supported.
The RAS/CAS signal output timing can be set through software in the DRAM control register and memory control
registers 1A/B and 2A/B.
Fig. 8-14-1 shows the DRAM access timing chart.
Note: For details on the timing settings, refer to section 8.6, “Description of Registers.”
MCLK
ASR
CAO
An
RASn
CAS
RE
Dn
CAS
ASC
Column
RSH
WEn
ASC
Column
CAO
ASR
CAS
WEN
Row
Row
RSH
Read
Write
Fig. 8-14-1
DRAM Access Timing Chart
For details on the various timing settings, refer to the description of the memory control register in section 8.6,
“Description of Registers.”
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...