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型號：	S80C154-20
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, 20 MHz, MICROCONTROLLER, PQCC44
文件頁數(shù)：	99/1021頁
文件大?。?/td>	15196K
代理商：	S80C154-20

32072H–AVR32–10/2012

AT32UC3A3

Functional Description

The EBI transfers data between the internal HSB bus (handled by the HMATRIX) and the exter-

nal memories or peripheral devices. It controls the waveforms and the parameters of the

external address, data and control busses and is composed of the following elements:

The Static Memory Controller (SMC)

The SDRAM Controller (SDRAMC)

The ECCHRS Controller (ECCHRS)

A chip select assignment feature that assigns an HSB address space to the external devices

A multiplex controller circuit that shares the pins between the different memory controllers

Programmable CompactFlash support logic

Programmable SmartMedia and NAND Flash support logic

Bus Multiplexing

The EBI offers a complete set of control signals that share the 16-bit data lines, the address

lines of up to 24 bits and the control signals through a multiplex logic operating in function of the

memory area requests.

Multiplexing is specifically organized in order to guarantee the maintenance of the address and

output control lines at a stable state while no external access is being performed. Multiplexing is

also designed to respect the data float times defined in the Memory Controllers. Furthermore,

refresh cycles of the SDRAM are executed independently by the SDRAMC without delaying the

other external memory controller accesses.

Static Memory Controller

For information on the Static Memory Controller, refer to the Static Memory Controller Section.

SDRAM Controller

Writing a one to the HMATRIX.SFR6.CS1A bit enables the SDRAM logic.

For information on the SDRAM Controller, refer to the SDRAM Section.

ECCHRS Controller

For information on the ECCHRS Controller, refer to the ECCHRS Section.

0 = Chip Select 2 (NCS[2]) is connected to a Static Memory device. For each

access to the NCS[2] memory space, all related pins act as SMC pins

1 = Chip Select 2 (NCS[2]) is connected to a NandFlash or a SmartMedia

device. For each access to the NCS[2] memory space, all related pins act as

NandFlash or SmartMedia pins

0 = Chip Select 1 (NCS[1]) is connected to a Static Memory device. For each

access to the NCS[1] memory space, all related pins act as SMC pins

1 = Chip Select 1 (NCS[1]) is connected to a SDRAM device. For each access

to the NCS[1] memory space, all related pins act as SDRAM pins

Table 14-3.

EBI Special Function Register Fields Description

SFR6 Bit

Bit name

Description

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
S80C154-30	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C154-36	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C154-L16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S80C186	制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:CMOS High-Integration 16-Bit Microprocessors
S80C186-12	制造商:Advanced Micro Devices 功能描述:MPU 80C86 CISC 16-Bit CMOS 12MHz 80-Pin PQFP

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