h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 167

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

6.1
The H8S/2169 or H8S/2149 has a built-in bus controller (BSC) that allows external address space
bus specifications, such as bus width and number of access states, to be set.
The bus controller also has a bus arbitration function, and controls the operation of the internal bus
masters: the CPU and data transfer controller (DTC).
6.1.1
The features of the bus controller are listed below.
Basic bus interface
Burst ROM interface
Idle cycle insertion
Bus arbitration function
2-state access or 3-state access can be selected
Program wait states can be inserted
External space can be designated as ROM interface space
1-state or 2-state burst access can be selected
An idle cycle can be inserted when an external write cycle immediately follows an external
read cycle
Includes a bus arbiter that arbitrates bus mastership between the CPU and DTC
Features
Overview
Section 6 Bus Controller
Rev. 3.00 Jan 18, 2006 page 139 of 1044
Section 6 Bus Controller
REJ09B0280-0300