. Electronic Components Datasheets 80c31 free download

File name 80c31.pdf

80C31BH 80C51BH 87C51 MCS 51 CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER Automotive Y Extended Automotive Temperature Y Programmable Serial Port Range ( b 40 C to a 125 C Ambient) Y TTL- and CMOS-Compatible Logic Y High Performance CHMOS Process Levels Y Power Control Modes Y 64K External Program Memory Space Y 4 Kbyte On-Chip ROM EPROM Y 64K External Data Memory Space Y 128 x 8-bit RAM Y IDLE and POWER DOWN Modes Y 32 Programmable I O Lines Y ONCE Mode Facilitates System Testing Y Two 16-Bit Timer Counters Y Available in 12 MHz and 16 MHz Y 5 Interrupt Sources Versions Y Quick-Pulse EPROM Programming Y Available in PLCC and DIP Packages (See Packaging Specification Order 231369) Y 2-Level Program Memory Lock EPROM Y Boolean Processor The MCS 51 CHMOS microcontroller products are fabricated on Intel's reliable CHMOS process and are functionally compatible with the standard MCS 51 HMOS microcontroller products This technology combines the high speed and density characteristics of HMOS with the low power attributes of CHMOS This combina- tion expands the effectiveness of the powerful MCS 51 microcontroller architecture and instruction set Like the MCS 51 HMOS microcontroller versions the MCS 51 CHMOS microcontroller products have the following features 4 Kbytes of EPROM ROM (87C51 80C51BH respectively) 128 bytes of RAM 32 I O lines two 16-bit timer counters a five-source two-level interrupt structure a full duplex serial port and on-chip oscillator and clock circuitry In addition the MCS 51 CHMOS microcontroller products exhibit low operating power along with two software selectable modes of reduced activity for further power reduction Idle and Power Down The Idle mode freezes the CPU while allowing the RAM timer counters serial port and interrupt system to continue functioning The Power Down mode saves the RAM contents but freezes the oscillator causing all other chip functions to be inoperative The 87C51 is the EPROM version of the 80C51BH It contains 4 Kbytes of on-chip program memory that can be electrically programmed and can be erased by exposure to ultraviolet light The 87C51 EPROM array uses a modified Quick-Pulse Programming algorithm by which the enti