ml675050 Oki Semiconductor, ml675050 Datasheet - Page 49

• Manufacturer Part Number: ml675050
• Description: Arm7tdmi Based Micro-controller For Ic Card Reader/writer
• Manufacturer: Oki Semiconductor

ELECTRICAL CHARACTERISTICS (AC CHARACTERISTICS)
(15) DRPC register setting and parameters (tRCD, tRAS, tRP, tDPL)
OKI Semiconductor
(Please see ML675050 User’s manual when refer to the DPRC register in detail)
DRAM SPEC: DRAM characteristics parameter setting
Note: For DRPC, see Section 11.6.3, “DRAM Characteristics Parameter Control Register.”
SDRAM DRAM SPEC [3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
:
1111
tRCD
1
1
2
2
2
2
2
2
3
3
Reserved
2
3
3
4
4
5
5
5
5
6
tRAS
1
1
2
2
2
2
2
3
3
3
tRP
tDPL
1
1
1
1
2
1
2
1
2
2
High-speed DRAM
Low-speed DRAM
If set to this value, operation is not
guaranteed.
:
If set to this value, operation is not
guaranteed.
High frequency
Low frequency
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