DS87C530_1 Datasheet, PDF (1/44 Pages) Dallas Semiconductor – EPROM/ROM Micro with Real Time Clock

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DS87C530/DS83C530
EPROM/ROM Micro with Real Time Clock
FEATURES
80C52-compatible
- 8051 instruction set-compatible
- Four 8-bit I/O ports
- Three 16-bit timer/counters
- 256 bytes scratchpad RAM
Large on-chip memory
- 16 kB EPROM (OTP)
- 1 kB extra on-chip SRAM for MOVX
ROMSIZE Feature
- Selects effective on-chip ROM size from
0 to 16kB
- Allows access to entire external memory
map
- Dynamically adjustable by software
- Useful as boot block for external Flash
Nonvolatile Functions
- On-chip Real Time Clock w/ Alarm
Interrupt
- Battery backup support of 1 kB SRAM
High-Speed Architecture
- 4 clocks/machine cycle (8051 = 12)
- Runs DC to 33 MHz clock rates
- Single-cycle instruction in 121 ns
- Dual data pointer
- Optional variable length MOVX to access
fast/slow RAM /peripherals
Power Management Mode
- Programmable clock source saves power
- Runs from (crystal/64) or (crystal/1024)
- Provides automatic hardware and software
exit
EMI Reduction Mode disables ALE
Two full-duplex hardware serial ports
High integration controller includes:
- Power-Fail Reset
- Early-Warning Power-Fail Interrupt
- Programmable Watchdog Timer
14 total interrupt sources with 6 external
PACKAGE OUTLINE
7
1
8
47
46
DALLAS
DS87C530
DS83C530
20
34
21
52-Pin PLCC
33
52-Pin CER QUAD
39
27
40
26
DALLAS
DS87C530
DS83C530
52
14
1
13
52-Pin TQFP OUTLINE
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