HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 642
HD6417034B
Manufacturer Part Number
HD6417034B
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417034B.pdf
(687 pages)
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Appendix A On-Chip Supporting Module Registers
Table A.45 DCR Bit Functions
Bit
15
14
13
12
11
10
9,8
Rev. 7.00 Jan 31, 2006 page 616 of 658
REJ09B0272-0700
Bit Name
2-CAS system/2-WE
system (CW2)
RAS down (RASD)
Number of RAS pre-charge
cycles (TPC)
Burst operation enable (BE) 0
CAS duty (CDTY)
Multiplex enable (MXE)
Multiplex shift count 1,0
(MXC1, MXC0)
Value
0
1
0
1
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
Description
2-CAS system: CASH, CASL, and WRL signals are
valid
2-WE system: CASL, WRH, and WRL signals are
valid
RAS up mode: Returns RAS signal to high and
waits for next DRAM access
RAS down mode: Leaves RAS signal low and waits
for next DRAM access
1-cycle pre-charge cycle inserted
2-cycle pre-charge cycle inserted
Normal mode: Full access
High-speed page mode: Burst operation
CAS signal high width duty ratio is 50% (Initial value)
CAS signal high width duty ratio is 35%
Row address and column address not multiplexed
Row address and column address multiplexed
Row address shift
(MXE = 1)
8 bits (Initial value)
9 bits
10 bits
Reserved
Row address for comparison
during burst (MXE = 0 or 1)
A27–A8
A27–A9
A27–A10
Reserved
(Initial value)
(Initial value)
(Initial value)
(Initial value)
(Initial value)
(Initial value)
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