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型號(hào)：	MQ80C52CXXX-36SBR
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44
文件頁(yè)數(shù)：	525/1447頁(yè)
文件大?。?/td>	3788K
代理商：	MQ80C52CXXX-36SBR

6437E–ATARM–23-Apr-13

CompactFlash Support

The External Bus Interface 0 integrates circuitry that interfaces to CompactFlash devices.

The CompactFlash logic is driven by the Static Memory Controller (SMC) on the NCS4 and/or

NCS5 address space. Programming the EBI_CS4A and/or EBI_CS5A bit of the EBI_CSA Reg-

ister in the Chip Configuration User Interface to the appropriate value enables this logic. (For

details on this register, refer to the Chip Configuration User Interface in the Bus Matrix Section.)

Access to an external CompactFlash device is then made by accessing the address space

reserved to NCS4 and/or NCS5 (i.e., between 0x5000 0000 and 0x5FFF FFFF for NCS4 and

between 0x6000 0000 and 0x6FFF FFFF for NCS5).

All CompactFlash modes (Attribute Memory, Common Memory, I/O and True IDE) are sup-

ported but the signals _IOIS16 (I/O and True IDE modes) and _ATA SEL (True IDE mode) are

not handled.

I/O Mode, Common Memory Mode, Attribute Memory Mode and True IDE Mode

Within the NCS4 and/or NCS5 address space, the current transfer address is used to distinguish

I/O mode, common memory mode, attribute memory mode and True IDE mode.

The different modes are accessed through a specific memory mapping as illustrated on Figure

20-5. A[23:21] bits of the transfer address are used to select the desired mode as described in

Figure 20-5. CompactFlash Memory Mapping

The A22 pin is used to drive the REG signal of the CompactFlash Device (except in True IDE

CF Address Space

Attribute Memory Mode Space

Common Memory Mode Space

I/O Mode Space

True IDE Mode Space

True IDE Alternate Mode Space

Offset 0x00E0 0000

Offset 0x00C0 0000

Offset 0x0080 0000

Offset 0x0040 0000

Offset 0x0000 0000

Table 20-6.

CompactFlash Mode Selection

A[23:21]

Mode Base Address

Attribute Memory

Common Memory

True IDE Mode

Alternate True IDE Mode

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