ADUC842 Datasheet, PDF (1/18 Pages) Analog Devices – 12- Bit ADCs and DACs with Embedded Hi-Speed 62KB FLASH MCU

PRELIMINARY TECHNICAL DATA
aADuC842 MicroConverter®, 12- Bit ADCs and DACs
with Embedded Hi-Speed 62KB FLASH MCU
Preliminary Technical Data
ADuC842
FEATURES
PIN COMPATABLE
Upgrade to ADuC812/ADuC832
INCREASED PERFORMANCE
Single Cycle 16MIPS 8052 core
High Speed 400kSPS 12-Bit ADC
INCREASED MEMORY
62Kbytes On-Chip Flash/EE Program Memory
4KBytes On-Chip Flash/EE Data Memory
In circuit re-programmable
Flash/EE, 100 Yr Retention, 100 Kcycles Endurance
2304 Bytes On-Chip Data RAM
SMALLER PACKAGE
Available in 8mm x 8mm Chip Scale Package
Also available in 52 pin PQFP - pin compatable with
ADuC812/ADuC831
ANALOG I/O
8-Channel, 400kSPS High Accuracy, 12-Bit ADC
On-Chip, 20 ppm/^oC Voltage Reference
DMA Controller, High-Speed ADC-to-RAM capture
Two 12-Bit Voltage Output DACs
Dual Output PWM-SD DACs
On-Chip Temperature Monitor Function
8051 Based Core
8051-Compatible Instruction Set (16.7 MHz Max)
High performance Single Cycle Core*
32kHz Ext Crystal,On-Chip Programmable-PLL
12 Interrupt Sources, Two Priority Levels
Dual Data Pointers, Extended 11-bit Stack Pointer
On-Chip Peripherals
Time Interval Counter (TIC)
UART, I2C and SPI^® Serial I/O
Watchdog Timer (WDT),
Power Supply Monitor (PSM)
Power
Normal: 6mA @ 5 V (Core CLK = 2.098 MHz)
Power-Down: 15µA @ 3 V
Development Tools
Low Cost, comprehensive development system
incorporating non-intrusive single pin emulation
IDE based, assembly and C source debug
APPLICATIONS
Optical Networking - Laser Power Control
Basestation Systems
Precision Instrumentation, Smart Sensors
Transient Capture Systems
DAS and Communications Systems
MicroConverter is a registered trademark of Analog Devices, Inc.
SPI is a registered trademark of Motorola Inc.
* 68% of insturctions completed in one or two clock cycles
REV. PrB
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FUNCTIONAL BLOCK DIAGRAM
A D C0
A D C1
.
.
.
A D C5
A D C6
A D C7
A D uC 842
12-BI T
DAC
BU F
D AC
MU X
TEM P
S EN SO R
IN TE R N AL
BA N DG AP
V R EF
T/H
P LL
OSC
4 0 0 K SP S
12 -B IT A D C
H AR DWAR E
C AL IBR A TION
12-BI T
DAC
16-BIT
Σ ∆ DAC
16-BIT
Σ ∆ DAC
16-BIT
PWM
16-BIT
PWM
BU F
MU X
D AC
P WM 0
PW M1
16 MIP S 8 0 51 -B AS ED MC U WITH AD D IT IO NA L
PE RIP H ER AL S
6 2 K BY TES FL A SH /EE PR O GR AM M EMO RY
4 KB YTES FLA SH /E E DA TA MEM O R Y
2 3 04 BY TE S US ER R AM
3 × 1 6 B IT TIM ER S
PO W ER S UP PL Y M O N
1 × R E AL TIM E C L O C K WA TC H DO G TIME R
4 × P AR A L LE L
P ORTS
U A RT , I2 C AN D SPI
S ERIA L I/O
VR E F
X TAL 1 XT AL 2
GENERAL DESCRIPTION
The ADuC842 is a complete smart transducer front-end, inte-
grating a high-performance self calibrating multichannel ADC,
dual DAC and an optimized single cycle 16MHz 8-bit
MCU(8051 instruction set compatible) on a single chip.
The device operates from a 32 kHz crystal with an on-chip PLL
generating a high-frequency clock of 16.77MHz. This clock is,
in turn, routed through a programmable clock divider from
which the MCU core clock operating frequency is generated.
The microcontroller is an optimized 8052 core offering up to 16
MIPS peak performance. 62 Kbytes of nonvolatile Flash/EE
program memory are provided on-chip. 4 Kbytes of nonvolatile
Flash/EE data memory, 256 bytes RAM and 2 KBytes of ex-
tended RAM are also integrated on-chip.
The ADuC842 also incorporates additional analog functionality
with two 12-bit DACs, power supply monitor, and a bandgap
reference. On-chip digital peripherals include two 16-bit Σ∆
DACs, dual output 16-bit PWM, watchdog timer, time interval
counter, three timers/counters, and three serial I/O ports (SPI,
I2C and UART).
On the ADuC812 and ADuC832 the I2C and SPI interfaces
shared some of the same pins. For backwards compatability
this is also the case for the ADuC842. However, there is also
the option to allow SPI operate separately on P3.3, P3.4 and
P3.5 while I2C uses the standard pins. The I2C interface has
also been enhanced to offer repeated start, general call and
quad addressing.
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. A functional block diagram of the ADuC842 is
shown above.
The part is specified for 3V and 5V operation with a maximum
operating frequency of 16.777MHz.
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© Analog Devices, Inc., 2003