HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 166
HD6413003RVF
Manufacturer Part Number
HD6413003RVF
Description
microcontroller (MCU)
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6413003RVF.pdf
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2CAS and 2WE Modes: The CAS/WE bit in RFSHCR can select two control modes for 16-bit-
wide DRAM: one using UCAS and LCAS; the other using UW and LW. These DRAM pins
correspond to H8/3003 pins as shown in table 7-6.
Table 7-6 DRAM Pins and H8/3003 Pins
H8/3003 Pin
HWR
LWR
RD
CS
Figure 7-5 (1) shows the interface timing for 2WE DRAM. Figure 7-5 (2) shows the interface
timing for 2CAS DRAM.
ø
(
(
(
(
Note:
Address
bus
3
CS
RAS
RD
CAS
HWR
UW
LWR
LW
RFSH
AS
3
)
)
)
)
*
16-bit access
Figure 7-5 DRAM Control Signal Output Timing (1) (2WE Mode)
Row
Read cycle
CAS/WE = 0 (2WE mode)
UW
LW
CAS
RAS
Column
Row
Write cycle
148
Column
DRAM Pin
*
CAS/WE = 1 (2CAS mode)
UCAS
LCAS
WE
RAS
Area 3 top address
Refresh cycle
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