Atmel C51 - Manual

Hardware Description C51 Microcontrollers Demo Board User Guide 2-4 4119C–8051–3/03 Section 2 Hardware Description 2.1 Block Diagram Figure 2-1. Block Diagram 2.2 Specifications 2.3 Supported Microcontrollers Most Atmel C51 and C251 microcontrollers are supported. The Demo Board does not support low...

Hardware Description C51 Microcontrollers Demo Board User Guide 2-6 4119C–8051–3/03 Figure 2-4. C51/C251 Demo Board Powered by J2. 2.5 Board Layout n On-Off – Switches ON the power supply. n Reset – Resets the microcontrollers. n INT1# – Issues an interruption on microcontollers on INT1# pin. n J8 C...

Hardware Description 2-7 C51 Microcontrollers Demo Board User Guide 4119C–8051–3/03 Figure 2-5. C51/C251 Demo Board 2.6 J11 Switches Table 1. J11 Switches (Set=1, Clear=0) J11 J9 J16 RS232 Cable to Terminal J8 J8 LCD CTRST + RESET INT1 OFF ON J17 R21 Page Mode Non Page Mode Synchro IN Synchro OUT RS...

Hardware Description C51 Microcontrollers Demo Board User Guide 2-8 4119C–8051–3/03 Table 2. J9 Switches Table 3. J16 Switches Figure 2-6. Switch Configuration Socket and Quartz Crystal The C51/C251 Demo Board provides three different sockets for microcontrollers, aPLCC44, a PLCC68 and a DIL24. Each...

Operation Mode C51 Microcontrollers Demo Board User Guide 3-10 4119C–8051–3/03 Section 3 Operation Mode 3.1 Flash Products 3.1.1 Switch Configuration To program the on-chip Flash memory, hardware configuration of the chip should be thefollowing: PSEN = 0, EA = 1 and ALE = 1 or not connected. On C51/...

Operation Mode 3-11 C51 Microcontrollers Demo Board User Guide 4119C–8051–3/03 3.2 ISP External Flash Memory Mode External Flash memory might be programmed using Windows hyper terminal or any ter-minal able to send HEX files in text mode. 3.2.1 Hardware Configuration The C51/C251 Demo Board must be ...

Operation Mode C51 Microcontrollers Demo Board User Guide 3-14 4119C–8051–3/03 After the download of the HEX file, the program asks if you want to download anotherHEX file in the second zone of the external Flash memory. In this case you’ll have to switch MAP SELECT (to access second zone) and senda...

Bill of Material C51 Microcontrollers Demo Board User Guide 4-16 4119C–8051–3/03 Section 4 Bill of Material Reference Type Qty Comment C1-C28 POL_CAPACITOR 4,7uF 2 CMS_TAJ_Package_B C2:C10-C19:C23 CAPACITOR 100nF 14 Package_0805 C11 POL_CAPACITOR 3,3uF 1 TAJ_CMS_Package_B C12 POL_CAPACITOR 10uF 1 TA...

C51 Demo Board User Guide 5-18 Rev. 4119C–8051–3/03 Section 5 Schematics

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