Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 305 of 1823
Jul 31, 2019
RX23W Group 16. Buses
16. Buses
16.1 Overview
Table 16.1 lists the bus specifications, Figure 16.1 shows the bus configuration, and Table 16.2 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)

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)