DS87C550 Datasheet, PDF (1/50 Pages) Dallas Semiconductor – 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
§ On-chip Memory
- 8 kbytes EPROM (OTP & Windowed Packages)
- 1 kbyte extra on-chip SRAM for MOVX access
§ On-chip Analog to Digital Converter
- Eight channels of analog input, 10-bit resolution
- Fast conversion time
- Selectable internal or external reference voltage
§ Pulse Width Modulator Outputs
- Four channels of 8-bit PWM
- Channels cascadable to 16-bit PWM
§ 4 Capture + 3 Compare Registers
§ 55 I/O Port Pins
§ New Dual Data Pointer Operation
- Either data pointer can be incremented or
decremented
§ ROMSIZE Feature
- Selects effective on-chip ROM size from 0 to 8k
- Allows access to entire external memory map
- Dynamically adjustable by software
§ High-Speed Architecture
- 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
§ 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
§ 16 total interrupt sources with 6 external
Available in 68-pin PLCC, 80-pin PQFP, and
68-pin windowed CLCC
PRODUCT PREVIEW
DS87C550
EPROM High-Speed
Micro with A/D and PWM
PIN ASSIGNMENT
9
1
10
61
60
DALLAS
DS87C550
26
44
27
43
68-Pin PLCC
68-Pin WINDOWED CLCC
80
65
1
64
DALLAS
DS87C550
24
41
25
40
80-Pin PQFP
1 of 50
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