User manual

RSK+RX62N 5. User Circuitry

REJ10J2198-0201 Rev. 2.01 Page 22 of 54

Nov 30, 2011

5.12 External Bus

The RX62N features an external data bus, which is connected to various devices on the RSK+ board. Details of the

devices connected to the external data bus are listed in Table 5-11 below. Further details of the devices connected to

the external bus can be found in the board schematics.

Chip Select Device Name Device Description Address Space

CS0* JA3 Application Header FF000000h to FFFFFFFFh (16Mbytes)

SDCS U5 128MBit SDRAM 08000000h to 0FFFFFFFh (128Mbytes)

CS1 to CS2 - Unused 06000000h to 07FFFFFFh (16Mbytes)

CS3 JA3 Application Header 05000000h to 05FFFFFFh (16Mbytes)

CS4 to CS7 - Unused 01000000h to 04FFFFFFh (4 x 16Mbytes)

Table 5-11: External Bus Address Space

5.13 Renesas Serial Peripheral Interface (RSPI)

The RX62N features two Renesas Serial Peripheral Interface modules (Renesas SPI or RSPI). Table 5-12 below

details the connected devices, and their connections to the MCU.

RSPI Channel Slave Select Device Name Device Description

1 SSLB0 U6 Serial Flash, 16Mbits

1 SSLB1 TFT Generic LCD Header

Table 5-12: SPI Connections

5.14 I

C Bus (Inter-IC Bus)

The RX62N features two I

C (Inter-IC Bus) interface modules. I

C module 0 is connected to a 16Kbit EEPROM

(Electronically-Erasable Programmable Read Only Memory). Specific details of the EEPROM device and the

connections can be found in the board schematics.

This device is configured to respond to the address 0x3. The first bit of the device address can be configured by

modifying option links – refer to §6 for further details.