PRODUCT PREVIEW
DS87C550
EPROM High-Speed
Micro with A/D and PWM
www.dalsemi.com
FEATURES
摟
87C52-Compatible
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8051 pin- and instruction set-compatible
Three 16-bit timer/counters
256 bytes scratchpad RAM
PIN ASSIGNMENT
9
1
61
-
摟
On-chip Memory
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10
60
8 kbytes EPROM (OTP & Windowed Packages)
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1 kbyte extra on-chip SRAM for MOVX access
摟
On-
chip Analog to Digital Converter
- Eight channels of analog input, 10-bit resolution
- Fast conversion time
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Selectable internal or external reference voltage
DALLAS
DS87C550
摟
Pulse Width Modulator Outputs
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-
摟
4 Capture + 3 Compare Registers
摟
55 I/O Port Pins
摟
New Dual Data Pointer Operation
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Four channels of 8-bit PWM
Channels cascadable to 16-bit PWM
26
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
摟
ROMSIZE Feature
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摟
High-Speed Architecture
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-
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64
-
摟
Unique Power Savings Modes
摟
EMI Reduction Mode disables ALE when not
needed
摟
High integration controller includes:
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-
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Power-fail reset
Early-warning power-fail interrupt
Two full-duplex hardware serial ports
Programmable watchdog timer
24
DALLAS
DS87C550
-
摟
16 total interrupt sources with 6 external
Available in 68-pin PLCC, 80-pin PQFP, and
68-pin windowed CLCC
41
25
80-Pin PQFP
40
1 of 50
061499