EDOSK2674 Renesas Electronics America, EDOSK2674 Datasheet - Page 36

• Manufacturer Part Number: EDOSK2674
• Description: DEV EVALUATION KIT H8S/2674
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of EDOSK2674

• Contents: EDOSK (Evaluation Development Operating System Kit) Board
• For Use With/related Products: H8S/2674R
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Read Strobe
The Expansion connector has a dedicated active low Read strobe (RDn).
EDOSK2674 Limitations-
RDn signal may be used.
Write Strobe
There are 4 active low Write Enable signals dedicated to the Expansion connector (WE0n to WE3n).
A 32-bit data bus may be separated into 4 bytes, the Write Enable signals are used to determine which of those
bytes are to be written.
EDOSK2674 Limitations-
WE0n may be used to enable write data on D0 to D7.
WE1n may be used to enable write data on D8 to D15.
WE2n and WE3n are not connected.
Note: For an 8-bit mapped area WE1n must be used.
Bus Strobe
The Expansion connector has a dedicated active low Bus strobe (BSn).
When low, this signifies the beginning of a bus cycle or it may be used for latching the address while in MPX mode.
EDOSK2674 Limitations-
BSn signal may be used.
Note: H8S2674R does not support MPX mode.
Wait
There are 4 active low WAIT signals dedicated to the Expansion connector (WAIT0n to WAIT3n).
These are used to hold off the bus cycle until the device being accessed is ready.
To avoid contention the plug-in hardware should have the facility to select which of these is to be used.
EDOSK2674 Limitations-
WAIT0n may be used.
WAIT1n to WAIT3n is not connected.
Interrupts
There are 8 Interrupt Request signals dedicated to the Expansion connector (IRQ1n to IRQ8n).
These are used to interrupt the main board processor. Depending upon the MCU IRQ may be level and/or edge
triggered.
To avoid contention the plug-in hardware should have the facility to select which of these is to be used.
EDOSK2674 Limitations-
IRQ1n to IRQ4n may be used.
IRQ5n may be used, but is also used by the Main Flash.
IRQ6n to IRQ8n are not connected.
Direct Memory Access
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