h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 141
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
- Current page: 141 of 766
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This LSI has an on-chip bus controller (BSC) that manages the external address space divided into
eight areas.
The bus controller also has a bus arbitration function, and controls the operation of the bus
masterships—the CPU and data transfer controller (DTC).
7.1
• Manages external address space in area units
• Basic bus interface
• Burst ROM interface
• Idle cycle insertion
• Bus arbitration function
BSCS203A_010020020400
Manages the external address space divided into eight areas of 2 Mbytes
Bus specifications can be set independently for each area
Burst ROM interface can be set
8-bit access or 16-bit access can be selected for each area
2-state access or 3-state access can be selected for each area
Program wait states can be inserted for each area
Burst ROM interface can be set for area 0
Choice of 1- or 2-state burst access
An idle cycle can be inserted between external read cycles for different areas
An idle cycle can be inserted before an external write cycle immediately after an external read
cycle
Includes a bus arbiter that arbitrates bus mastership between the CPU and DTC
Features
Section 7 Bus Controller (BSC)
Rev. 2.00 Dec. 05, 2005 Page 103 of 724
Section 7 Bus Controller (BSC)
REJ09B0200-0200
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