This part is a kind of semiconductor called AT89C5122.

Function of this product has Smart Card Reader ICs.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Addendum to Datasheet This document is an addendum for the Smart Card Interface block concerning the “Initialization Procedure” section of the AT8xC5122/3 datasheet, available on the Atmel web site. Table 1. DCCKPS.7 (S:BFh) : MODE bit management CVCC DC/DC Output voltage LI pin With Inductor MODE bit Start After VCARDOK = 1 No inductor Notes: Start 5V 0 0 1 3V 1/0 1 1 1 (1) Smart Card Reader ICs AT83C5122 AT83EC5122 AT85C5122 AT85EC5122 AT89C5122 AT83C5123 AT83EC5123 1.8V 1 / 0(1) 1 1 1 After VCARDOK = 1 1 1. 1 is recommended and 0 is allowed. Figure 1. MODE bit start procedure MODE = 1 VCARD[1:0]= 5V ? Inductor ? MODE = 0 Refe r to scib_ hw_ dcdcstart fu nctio n in scib _lib.c & config.h from scib_hid_usb_2_2_4.zip package. Rev. 4372A–SCR–08/04 1 Atmel Headquarters Cor [ ... ]

AT89C5122 PDF Datasheet Download