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External bus interface registers, 1 area select registers 0-7(asr0-7) – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 31 External Bus

2.External Bus Interface Registers

2. External Bus Interface Registers

This section explains the registers used in the external bus interface.

Register Types

The following registers are used by the external bus interface:

Area select registers (ASR0-7)

Area configuration registers (ACR0-7)

Area wait registers (AWR0-7)

Memory configuration register (MCRA for SDRAM/FCRAM auto - precharge OFF mode)

Memory configuration register (MCRB for FCRAM auto - precharge ON mode)

I/O wait registers for DMAC (IOWR0-3)

Chip select enable register (CSER)

Cache enable register (CHER)

Pin/timing control register (TCR)

Mode register (MODR)

2.1 Area Select Registers 0-7(ASR0-7)

This section explains the configuration and functions of area select registers 0-7 (ASR0-7).

Configuration of area select registers 0-7 (ASR0-7)

The area select registers (ASR0-7: Area Select Registers 0-7) specify the start address of each chip select area
of CS0-CS7.

Figure 2-1

"Configuration of the Area Select Registers (ASR0-7)" shows the configuration of area select registers

0-7 (ASR0-7: Area Select Register).