R01UH0823EJ0100 Rev.1.00
Page 305 of 1823
Jul 31, 2019
RX23W Group
16. Buses
16.
Buses
16.1
Overview
shows the bus configuration, and
lists the addresses
assigned for each bus.
Table 16.1
Bus Specifications
Bus Type
Description
CPU bus
Instruction bus
Connected to the CPU (for instructions)
Connected to on-chip memory (RAM, ROM)
Operates in synchronization with the system clock (ICLK)
Operand bus
Connected to the CPU (for operands)
Connected to on-chip memory (RAM, ROM)
Operates in synchronization with the system clock (ICLK)
Memory bus
Memory bus 1
Connected to RAM
Memory bus 2
Connected to ROM
Internal main bus
Internal main bus 1
Connected to the CPU
Operates in synchronization with the system clock (ICLK)
Internal main bus 2
Connected to the DMAC and DTC
Connected to on-chip memory (RAM, ROM)
Operates in synchronization with the system clock (ICLK)
Internal peripheral
bus
Internal peripheral bus 1
Connected to peripheral modules (DTC, DMAC, interrupt controller, and bus
error monitoring section)
Operates in synchronization with the system clock (ICLK)
Internal peripheral bus 2
Connected to peripheral modules (modules other than those connected to
internal peripheral buses 1, 3, and 4)
Operates in synchronization with the peripheral-module clock (PCLKB)
Internal peripheral bus 3
Connected to peripheral modules (USB0, RSCAN, and CTSU)
Operates in synchronization with the peripheral-module clock (PCLKB)
Internal peripheral bus 4
Connected to peripheral modules (MTU2)
Operates in synchronization with the peripheral-module clock (PCLKA)
Internal peripheral bus 6
Connected to the flash control module and E2 DataFlash
Operates in synchronization with the FlashIF clock (FCLK)