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AT89C5122D-RDRUM 数据表(PDF) 3 Page - ATMEL Corporation |
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AT89C5122D-RDRUM 数据表(HTML) 3 Page - ATMEL Corporation |
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3 / 208 page  3 AT83R5122, AT8xC5122/23 4202F–SCR–07/2008 Product Description AT8xC5122/23 products are high-performance CMOS derivatives of the 80C51 8-bit microcontrollers designed for USB smart card reader applications. The AT8xC5122 is proposed in four versions : - ROM version referenced AT83R5122 is only factory programmable. - CRAM version without internal data E2PROM. The CRAM device implements a vola- tile program memory which is programmed by means of an embedded ROMed bootloader which transfers the code from a remote software programming tool called FLIP through UART or USB interfaces. - Flash version without internal data E2PROM. At power-up, the program located in the flash memory is transferred into the CRAM then executed. The AT83C5123 is a low pin count of the AT8xC5122 and is proposed in ROM version with or without internal data E2PROM. The ROM device is only factory programmable. The AT8xC5122DS is a secure version of the AT8xC5122 on which the external pro- gram memory access mode is disabled. Table 1. Product versions Features AT83C5122 AT83R5122 AT85C5122 AT89C5122 AT89C5122DS AT83C5123 Packages VQFP64 QFN64 Die Form PLCC68 VQFP64 Die Form VQFP64 QFN64 VQFP64 QFN64 VQFP32 QFN32 Die Form Program memory 32KB ROM 32KB CRAM 32KB E2PROM 32KB E2PROM 30KB ROM Internal Data E2PROM No No No No No Embedded bootloader No Yes Yes Yes No Features VQFP32, QFN32 packages Features not available : - Keyboard Interface - Master/Slave SPI Interface - External Program Memory Access Reduced features : - Only 12 I/O with up to 4 LED Outputs with Programmable Current PLCC68, VQFP64,QFN64 packages All features are available All features are available except External Program Memory Access |
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