EPROM High-Speed Micro with A/D and PWM
PRODUCT PREVIEW
DS87C550
EPROM High-Speed Micro with A/D and PWM
www.dalsemi.com
FEATURES
§ 87C52-Compatible
8051 pin-...
Description
PRODUCT PREVIEW
DS87C550
EPROM High-Speed Micro with A/D and PWM
www.dalsemi.com
FEATURES
§ 87C52-Compatible
8051 pin- and instruction set-compatible Three 16-bit timer/counters 256 bytes scratchpad RAM 8 kbytes EPROM (OTP & Windowed Packages)
PIN ASSIGNMENT
9 1 61
§ On-chip Memory
-
10
60
- 1 kbyte extra on-chip SRAM for MOVX access § On-chip Analog to Digital Converter
-
§ Pulse Width Modulator Outputs
-
Eight channels of analog input, 10-bit resolution Fast conversion time Selectable internal or external reference voltage Four channels of 8-bit PWM Channels cascadable to 16-bit PWM
26
DALLAS DS87C550
§ 4 Capture + 3 Compare Registers § 55 I/O Port Pins § New Dual Data Pointer Operation
-
44
Either data pointer can be incremented or decremented Selects effective on-chip ROM size from 0 to 8k Allows access to entire external memory map Dynamically adjustable by software 4 clocks/machine cycle (8051 = 12) Runs DC to 33 MHz clock rates Single-cycle instruction in 121 ns New Stretch Cycle feature allows access to fast/slow memory or peripherals
1
27 68-Pin PLCC 68-Pin WINDOWED CLCC 80 65
43
§ ROMSIZE Feature
-
§ High-Speed Architecture
-
64
-
§ Unique Power Savings Modes § EMI Reduction Mode disables ALE when not needed § High integration controller includes:
Power-fail reset Early-warning power-fail interrupt Two full-duplex hardware serial ports Programmable watchdog timer
24
DALLAS DS87C550
§ 16 total interrupt sources with 6 external
Available in 68-p...
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