SAB82525N View Datasheet(PDF) - Infineon Technologies

Part Name

Description

MFG CO.

SAB82525N

Data Communications ICs

Infineon Technologies 

SAB 82525

SAB 82526

SAF 82525

SAF 82526

Pin Definitions and Functions (cont’d)

Pin No.

Symbol Input (I) Function

P-LCC P-MQFP

Output (O)

40 1

38 43

DRQTA O

DRQTB

DMA Request Transmitter (channel A/channel B)

The transmitter of the HSCX requests a DMA data transfer

by activating this line.

The DRQTn remains high as long as the transmit FIFO

requires data transfers.

The amount of data bytes to be transferred from system

memory to the HSCX (= byte count) must be written first to

the XBCH, XBCL registers.

Always blocks of data (n x 32 bytes + REST, n = 0, 1,…)

are transferred till the byte count is reached.

DRQTn is deactivated immediately following the falling

edge of the last WR cycle.

41 2

VDD

I

Power supply + 5 V.

Semiconductor Group

15

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