H8SX1663 datasheet(238/1158 Pages) RENESAS

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Section 6 Bus Controller (BSC)

Rev.1.00 Jun. 07, 2006 Page 186 of 1102

REJ09B0294-0100

(4) Area 3

In externally extended mode, all of area 3 is external address space.

When area 3 external address space is accessed, the

CS3 signal can be output.

Either of the basic bus interface, byte control SRAM interface, or address/data multiplexed I/O

interface can be selected for area 3 by bit MPXE3 in MPXCR and bit BCSEL3 in SRAMCR.

Table 6.10 shows the external interface of area 3.

Table 6.10

Area 3 External Interface

Interface

MPXE3 of MPXCR

BCSEL3 of SRAMCR

Basic bus interface

Byte control SRAM interface

Address/data multiplexed I/O

interface

Setting prohibited

(5) Area 4

In externally extended mode, all of area 4 is external address space.

When area 4 external address space is accessed, the

CS4 signal can be output.

Either of the basic bus interface, byte control SRAM interface, or address/data multiplexed I/O

interface can be selected for area 4 by bit MPXE4 in MPXCR and bit BCSEL4 in SRAMCR.

Table 6.11 shows the external interface of area 4.

Table 6.11

Area 4 External Interface

Interface

MPXE4 of MPXCR

BCSEL4 of SRAMCR

Basic bus interface

Byte control SRAM interface

Address/data multiplexed I/O

interface

Setting prohibited

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