Electronic Components Datasheet Search |
|
DS80C390 Datasheet(PDF) 2 Page - Dallas Semiconductor |
|
DS80C390 Datasheet(HTML) 2 Page - Dallas Semiconductor |
2 / 58 page DS80C390 2 of 58 110199 DESCRIPTION The DS80C390 is a fast 8051-compatible microprocessor. The redesigned processor core executes 8051 instructions up to 3 times faster than the original for the same crystal speed. The DS80C390 supports a maximum crystal speed of 40 MHz, resulting in apparent execution speeds of 100 MHz (approximately 2.5X). An optional internal frequency multiplier allows the microprocessor to operate at full speed with a reduced crystal frequency, reducing EMI. A hardware math accelerator further increases the speed of 32 and 16 bit multiply and divide operations, as well as high-speed shift, normalization and accumulate functions. The DS80C390 features two full-function Controller Area Network (CAN) 2.0B controllers. Status and control registers are distributed between SFRs and 512 bytes of internal MOVX memory for maximum flexibility. In addition to standard 11-bit or 29-extended message identifiers, the device supports two separate 8-bit media masks and media arbitration fields to support the use of higher-level CAN protocols such as DeviceNet and SDS. All of the standard 8051 resources such as three timer/counters, serial port, and four 8-bit I/O ports (plus two 8-bit ports dedicated to memory interfacing) are included in the DS80C390. In addition it includes a second hardware serial port, seven additional interrupts, programmable watchdog timer, brown-out monitor, power-fail reset, and a programmable output clock that supports an IRDA interface. The device provides dual data pointers with increment/decrement features to speed block data memory moves. It also can adjust the speed of MOVX data memory access from two to twelve machine cycles for flexibility in addressing external memory and peripherals. The device incorporates a 4kB SRAM, which can be configured as various combinations of MOVX memory, program memory, and optional stack memory. A 22-bit program counter supports access to a maximum of 4 MB of external program memory and 4 MB of external data memory. A 10-bit stack pointer addresses up to 1kB of MOVX memory for increased code efficiency. A new Power Management Mode (PMM) is useful for portable or power-conscious applications. This feature allows software to switch from the standard machine cycle rate of 4 clocks per cycle to 1024 clocks per cycle. For example, at 12 MHz standard operation has a machine cycle rate of 3 MHz. In Power Management Mode at the same external clock speed, software can select 11.7 kHz machine cycle rate. There is a corresponding reduction in power consumption when the processor runs slower. The EMI reduction feature allows software to select a reduced electromagnetic interference (EMI) mode by disabling the ALE signal when it is unneeded. The device also incorporates active current control on the address and data buses, reducing EMI by minimizing transients when interfacing to external circuitry. ORDERING INFORMATION Part Number Package Max. Clock Speed Temperature Range DS80C390-QCR 68-pin PLCC 40 MHz 0 °C to +70°C DS80C390-FCR 64-pin LQFP 40 MHz 0 °C to +70°C DS80C390-QNR 68-pin PLCC 40 MHz -40 °C to +85°C DS80C390-FNR 64-pin LQFP 40 MHz -40 °C to +85°C |
Similar Part No. - DS80C390 |
|
Similar Description - DS80C390 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |