aduc831 是一個(gè)完全綜合的247 k采樣保持?jǐn)?shù)據(jù)采集系統(tǒng)，在同一片中 結(jié)合了高性能的自校準(zhǔn)12位 adc 多路通道，雙12位 dac通道和可編程8位 mcu。微處理器核心是 8052,片內(nèi) 62 kb 非易失性閃速/電擦除程序存儲(chǔ)器。還片內(nèi) 4 kb 非易失性閃速/電擦除數(shù)據(jù)存儲(chǔ)器、256 b ram 和2 kb 擴(kuò)展 ram。

　　aduc831 還額外的電源監(jiān)視器, 和一個(gè)高精度參考源。片內(nèi)數(shù)字外圍設(shè)備包括2個(gè)16位σ-δ dac, 雙輸出16位 pwm,看門狗定時(shí)器, 定時(shí)間隔計(jì)數(shù)器,3個(gè)定時(shí)器/計(jì)數(shù)器, 定時(shí)器 3用于波特率產(chǎn)生核 串行接口 i/o (i2c, spi 和uart) 。

　　并且片內(nèi)串行下載和調(diào)試模式 (通過(guò) uart), 并且通過(guò)ea引腳單引腳競(jìng)爭(zhēng)模式。aduc831 支持 quickstart 和 quickstart plus 升級(jí)系統(tǒng)和低成本的軟件和硬件工具。

 information furnished by analog devices is believed to be accurate and
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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
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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