18.4.12 Example 1 Of Address Space Priority; Figure 18.11 Example 1 Of Address Space Priority - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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18.4.12 Example 1 of Address Space Priority

Figure 18.11 shows an example of an address translation when the host address spaces are

overlapped. When an address is translated with the settings shown in figure 18.11, host address

spaces 1 and 2 are overlapped and host address space 2 and the on-chip RAM space are

overlapped. In this case, since command space has priority over others, it is translated into slave

command space. Then address space 1 is translated into slave address space 1. Next, the on-chip

RAM which has priority over address space 2 and is not overlapped with address space 1 is

translated into the slave on-chip RAM space.

HBAR1: H'0000, HBAR2: H'0008, RAMBAR: H'000D

SAR1: H'00, SAR2: H'10, RAMAR: H'E0

ASSR: H'64 (768 k, 512 k), RAMASSR: H'10 (4 k)

Host address

Notes: Addresses of H'000D_FFF0 to H'000D_FFFF in the host address are used as command space.

Addresses of H'15_FFF0 to H'15_FFFF in the slave address are used as command space.

Address space 1

Address space 2

Section 18 LPC Interface (LPC)

Slave address

Rev. 3.00 Jul. 14, 2005 Page 703 of 986

Address space 1

Address space 2

Command space

On-chip RAM space

REJ09B0098-0300

H8s/2100 series H8s/2114r R4f2114r