r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 199
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
r4f24565NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24565NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVFQV
Manufacturer:
REA
Quantity:
15
Company:
Part Number:
r4f24568NVFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24568NVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24568NVZFQV
Manufacturer:
REA
Quantity:
5
Company:
Part Number:
r4f24568NVZFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Company:
Part Number:
r4f24569DVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
r4f24569DVRFQV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
r4f24569VFQV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
- Current page: 199 of 1376
- Download datasheet (8Mb)
6.3.9
DRAMCR is used to make DRAM/synchronous DRAM interface settings.
Note: The synchronous DRAM interface is not supported by the H8S/2456 Group and H8S/2454
Bit
15
14
13
Group.
Bit Name
OEE
RAST
—
DRAM Control Register (DRAMCR)
Initial Value
0
0
0
R/W
R/W
R/W
R/W
Description
OE Output Enable
The OE signal used when EDO page mode DRAM
is connected can be output from the (OE) pin. The
OE signal is common to all areas designated as
DRAM space.
When the synchronous DRAM is connected, the
CKE signal can be output from the (OE) pin. The
CKE signal is common to the continuous
synchronous DRAM space.
0: OE/CKE signal output disabled
1: OE/CKE signal output enabled
RAS Assertion Timing Select
Selects whether, in DRAM access, the RAS signal
is asserted from the start of the T
edge of φ) or from the falling edge of φ.
Figure 6.4 shows the relationship between the
RAST bit setting and the RAS assertion timing.
The setting of this bit applies to all areas
designated as DRAM space.
0: RAS is asserted from φ falling edge in T
1: RAS is asserted from start of T
Reserved
This bit can be read from or written to. However,
the write value should always be 0.
(OE)/(CKE) pin can be used as I/O port
Rev. 1.00 Sep. 19, 2008 Page 169 of 1342
Section 6 Bus Controller (BSC)
r
r
cycle (rising
REJ09B0467-0100
cycle
r
cycle
Related parts for r4f2456
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Renesas Technology Corp [Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series]
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Renesas Starter Kit for RX210
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas StarterKit for RX630
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit+ for RX63N
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
EVALBOARD/Renesas Starter Kit
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
FLASH PROGRAMMER FOR RENESAS MICROCONTROLLERS
Manufacturer:
Renesas Electronics Corporation.
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet:
Part Number:
Description:
Manufacturer:
Renesas Electronics Corporation.
Datasheet: