ADUC814 Analog Devices, ADUC814 Datasheet - Page 16

• Manufacturer Part Number: ADUC814
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 8kB Flash + 6-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC814

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 256Bytes
• Gpio Pins: 17
• Adc # Channels: 6

ADuC814
ADuC814 ARCHITECTURE, MAIN FEATURES
The ADuC814 is a fully integrated 247 kSPS 12-bit data
acquisition system incorporating a high performance multi-
channel ADC, an 8-bit MCU, and program/data Flash/EE
memory on a single chip.
This low power device operates from a 32 kHz crystal with an
on-chip PLL generating a high frequency clock of 16.78 MHz.
This clock is, in turn, routed through a programmable clock
divider from which the MCU core clock operating frequency is
generated.
The microcontroller core is an 8052, and therefore 8051,
instruction set compatible. The microcontroller core machine
cycle consists of 12 core clock periods of the selected core
operating frequency. Eight kbytes of nonvolatile Flash/EE
program memory are provided on-chip. 640 bytes of nonvolatile
Flash/EE data memory and 256 bytes RAM are also integrated
on-chip.
The ADuC814 also incorporates additional analog functionality
with dual 12-bit DACs, a power supply monitor, and a band gap
ADC0
V
C
ADC5
REF
REF
11
21
16
17
TEMP MONITOR
DAC0
DAC1
V
AGND
MUX
AIN
REF
REFERENCE
BAND GAP
BUF
T/H
POR
12-BIT
ADC
ASYNCHRONOUS
SERIAL PORT
(UART)
DOWNLOADER
Figure 17. ADuC814 Block Diagram
DEBUGGER
PROGRAM
FLASH/EE
FLASH/EE
640 × 8
DATA
8k × 8
Rev. A | Page 16 of 72
CONTROL
LOGIC
ADC
AND
CAL
ADuC814
CORE
8052
MCU
reference. On-chip digital peripherals include a watchdog timer,
time interval counter, three timer/counters, and three serial I/O
ports (SPI, UART, I
On-chip factory firmware supports in-circuit serial download
and debug modes (via UART), as well as single-pin emulation
mode via the DLOAD pin. A detailed functional block diagram
of the ADuC814 is shown in Figure 17.
The ADuC814 is supported by a QuickStart Development
System. This is a full-featured, low cost system, consisting of
PC-based (Windows compatible) hardware and software
development tools.
The part operates from a single 3 V or 5 V supply. When
operating from 3 V supplies, the power dissipation for the part
is below 10 mW. The ADuC814 is housed in a 28-lead TSSOP
package and is specified for operation over an extended
temperature range −40°C to +125°C.
CONTROL
LOGIC
DAC
POWER SUPPLY
INTERFACE
SPI SERIAL
WATCHDOG
USER RAM
MONITOR
256 × 8
TIMER
2
C).
DAC0
DAC1
DIVIDER
CLOCK
PROG.
INTERVAL
COUNTER
COUNTER
TIMERS
16-BIT
OSC
AND
PLL
TIME
BUF
BUF
DAC1
T0
T1
T2
T2EX
DAC0
D0
D1
INT0
INT1