HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 153

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

This LSI has an on-chip bus controller (BSC) that manages the bus width and the number of
access states of the external address space. The BSC also has a bus arbitration function, and
controls the operation of the internal bus masters – CPU, and data transfer controller (DTC).
6.1
BSCS20AA_000020020700
Basic bus interface
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
A burst ROM interface can be set for basic expansion areas
1-state access or 2-state access can be selected for burst access
Idle cycle insertion
An idle cycle can be inserted for external write cycles immediately after external read cycles
Bus arbitration function
Includes a bus arbiter that arbitrates bus mastership between the CPU and DTC
External bus control signals
Features
Section 6 Bus Controller (BSC)
Figure 6.1 Block Diagram of Bus Controller
Bus arbiter
controller
controller
Bus
Wait
WSCR
BCR
CPU bus request signal
DTC bus request signal
CPU bus acknowledge signal
DTC bus acknowledge signal
Rev. 2.0, 08/02, page 113 of 788
Internal control signals
Bus mode signal