aduc831 是一个完全综合的247 k采样保持数据采集系统，在同一片中 结合了高性能的自校准12位 adc 多路通道，双12位 dac通道和可编程8位 mcu。微处理器核心是 8052,片内 62 kb 非易失性闪速/电擦除程序存储器。还片内 4 kb 非易失性闪速/电擦除数据存储器、256 b ram 和2 kb 扩展 ram。
aduc831 还额外的电源监视器, 和一个高精度参考源。片内数字外围设备包括2个16位σ-δ dac, 双输出16位 pwm,看门狗定时器, 定时间隔计数器,3个定时器/计数器, 定时器 3用于波特率产生核 串行接口 i/o (i2c, spi 和uart) 。
并且片内串行下载和调试模式 (通过 uart), 并且通过ea引脚单引脚竞争模式。aduc831 支持 quickstart 和 quickstart plus 升级系统和低成本的软件和硬件工具。
information furnished by analog devices is believed to be accurate and
reliable. however, no responsibility is assumed by analog devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. no license is granted by implication or otherwise
under any patent or patent rights of analog devices. trademarks and
registered trademarks are the property of their respective companies.
one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a.
tel: 781/329-4700 www.analog.com
fax: 781/326-8703 ? analog devices, inc., 2002. all rights reserved.
aduc831
features
analog i/o
8-channel, 247 ksps 12-bit adc
dc performance: h115501 lsb inl
ac performance: 71 db snr
dma controller for high speed adc-to-ram capture
2 12-bit (monotonic) voltage output dacs
dual output pwm/h9018-h9004 dacs
on-chip temperature sensor function h115503h11543c
on-chip voltage reference
memory
62 kbytes on-chip flash/ee program memory
4 kbytes on-chip flash/ee data memory
flash/ee, 100 yr retention, 100 kcycles endurance
2304 bytes on-chip data ram
8051 based core
8051 compatible instruction set (16 mhz max)
12 interrupt sources, 2 priority levels
dual data pointer
extended 11-bit stack pointer
on-chip peripherals
time interval counter (tic)
uart, i
2
c
?
, and spi
?
serial i/o
watchdog timer (wdt), power supply monitor (psm)
power
specified for 3 v and 5 v operation
normal, idle, and power-down modes
power-down: 20 h9262a @ 3 v
applications
optical networking—laser power control
base station systems
precision instrumentation, smart sensors
transient capture systems
das and communications systems
pin compatible upgrade to existing aduc812 systems
that require additional code or data memory. runs
from 1 mhz–16 mhz to external crystal.
the aduc832 is also available. functionally is the same
as the aduc831, except the aduc832 runs from a 32 khz
external crystal with on-chip pll.
microconverter is a registered trademark and quickstart is a trademark
of analog devices, inc.
spi is a registered trademark of motorola, inc.
i
2
c is a registered trademark of philips corporation.
general description
the aduc831 is a fully integrated 247 ksps data acquisition
system incorporating a high performance self-calibrating multi-
channel 12-bit adc, dual 12-bit dacs, and programmable
8-bit mcu on a single chip.
the microcontroller core is an 8052, and therefore 8051-
instruction-set compatible with 12 core clock periods per machine
cycle. 62 kbytes of nonvolatile flash/ee program memory are
provided on-chip. four kbytes of nonvolatile flash/ee data
memory, 256 bytes ram and 2 kbytes of extended ram are
also integrated on-chip.
the aduc831 also incorporates additional analog functionality
with two 12-bit dacs, power supply monitor, and a band gap
reference. on-chip digital peripherals include two 16-bit σ-?
dacs, dual output 16-bit pwm, watchdog timer, time interval
counter, three timers/counters, timer 3 for baud rate generation
and serial i/o ports (i
2
c, spi and uart).
on-chip factory firmware supports in-circuit serial download and
debug modes (via uart), as well as single-pin emulation mode
via the ea pin. the aduc831 is supported by quickstart? and
quickstart plus development systems featuring low cost software
and hardware development tools. a functional block diagram of
the aduc831 is shown above with a more detailed block diagram
shown in figure 1.
the part is specified for 3 v and 5 v operation over the extended
industrial temperature range, and is available in a 52-lead plastic
quad flatpack package and in a 56-lead chip scale package.
functional block diagram
62 kbytes flash/ee program memory
4 kbytes flash/ee data memory
2304 bytes user ram
3 h11547 16 bit timers
1 h11547 real time clock
parallel
ports
8051-based mcu with additional
peripherals
aduc831
xtal2xtal1
temp
sensor
v
ref
internal
band gap
vref
adc0
adc1
adc5
adc6
adc7
osc
12-bit
dac
dac
pwm0
t/h
mux
12-bit adc
hardware
calibraton
buf
dacbuf
pwm1
12-bit
dac
16-bit
h9018-h9004 dac
16-bit
h9018-h9004 dac
16-bit
pwm
16-bit
pwm
power supply mon
watchdog timer
uart, i
2
c, and spi
serial i/o
mux
microconverter
?
, 12-bit adcs and dacs
with embedded 62 kbytes flash mcu