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型號(hào)：	E5550F-DOW
廠商：	ATMEL CORP
元件分類：	通信及網(wǎng)絡(luò)
英文描述：	SPECIALTY TELECOM CIRCUIT, UUC7
封裝：	DIE-7
文件頁(yè)數(shù)：	944/1069頁(yè)
文件大?。?/td>	14303K
代理商：	E5550F-DOW

SAM4CP [DATASHEET]

43051E–ATPL–08/14

41.4.3.2 Auto Mode

The Auto Mode is similar to the manual one, except that in this mode, as soon as the correct number of AES_IDATARx is

written, processing is automatically started without any action in the AES_CR.

41.4.3.3 PDC Mode

The Peripheral DMA Controller (PDC) can be used in association with the AES to perform an encryption/decryption of

a buffer without any action by software during processing.

The field SMOD in the AES_MR must be configured to 0x2.

The sequence order is as follows:

Write the AES_MR with all required fields, including but not limited to SMOD and OPMOD.

Write the key in the AES_KEYWRx.

Write the initialization vector (or counter) in the AES_IVRx.

The AES_IVRx concern all modes except ECB.

Set the Transmit Pointer Register (AES_TPR) to the address where the data buffer to encrypt/decrypt is stored

and the Receive Pointer Register (AES_RPR) where it must be encrypted/decrypted.

Transmit and receive buffers can be identical.

Set the Transmit and the Receive Counter Registers (AES_TCR and AES_RCR) to the same value. This value

must be a multiple of the data transfer type size (see

Table 41-3 "Data Transfer Type for the Different Operation

The same requirements are necessary for the Next Pointer(s) and Counter(s) of the PDC (AES_TNPR,

AES_RNPR, AES_TNCR, AES_RNCR).

If not already done, set the bit ENDRX (or RXBUFF if the next pointers and counters are used) in the AES_IER,

depending on whether an interrupt is required or not at the end of processing.

Enable the PDC in transmission and reception to start the processing (AES_PTCR).

When the processing completes, the ENDRX (or RXBUFF) flag in the AES_ISR is raised. If an interrupt has been

enabled by setting the corresponding bit in the AES_IER, the interrupt line of the AES is activated.

When PDC is used, the data size to transfer (byte, half-word or word) depends on the AES mode of operations. This size

is automatically configured by the AES.

Data Transfer Type for the Different Operation Modes

Operation Mode

Data Transfer Type

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
E5550F-S8	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-DIT	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-DOW	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder
E5551A-FP008	制造商:未知廠家制造商全稱:未知廠家功能描述:TRANSPONDER\|CMOS\|SOP\|8PIN\|PLASTIC
E5552	制造商:未知廠家制造商全稱:未知廠家功能描述:Transponder

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