M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 38

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

BIU’s function and operation are described below.
CENTRAL PROCESSING UNIT (CPU)
2.2 Bus interface unit
2.2 Bus interface unit
A bus interface unit (BIU) is built-in between the central processing unit (CPU) and memory•I/O devices.
When externally connecting devices, refer to “Chapter 12. CONNECTION WITH EXTERNAL DEVICES.”
2–10
2.2.1 Overview
Transfer operation between the CPU and memory•I/O devices is always performed via the BIU.
Figure 2.2.1 shows the bus and bus interface unit (BIU).
data is read to the BIU. The BIU reads data from the specified address and passes it to the CPU.
is written to the BIU and write data. The BIU writes the data to the specified address.
bus.
When the CPU reads data from the memory
When the CPU writes data to the memory I/O device, the CPU first specifies the address to which data
To perform the above operations
The BIU reads an instruction from the memory before the CPU executes it.
to
7702/7703 Group User’s Manual
, the BIU inputs and outputs the control signals, and control the
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•
I/O device, the CPU first specifies the address from which