Datasheet

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SBAS203J − MARCH 2002 − REVISED JANUARY 2008
www.ti.com
20
DESCRIPTION
The MSC1210Yx is a completely integrated family of
mixed-signal devices incorporating a high-resolution
delta-sigma ADC, 8-channel multiplexer, burnout current
sources, selectable buffered input, offset DAC
(digital-to-analog converter), PGA (programmable gain
amplifier), temperature sensor, voltage reference, 8-bit
microcontroller, Flash Program Memory, Flash Data
Memory, and Data SRAM, as shown in Figure 8.
On-chip peripherals include an additional 32-bit
accumulator, an SPI-compatible serial port, dual USARTs,
multiple digital input/output ports, watchdog timer,
low-voltage detect, on-chip power-on reset, 16-bit PWM,
and system timers, brownout reset, and three
timer/counters.
The device accepts low-level differential or single-ended
signals directly from a transducer. The ADC provides 24
bits of resolution and 24 bits of no-missing-code
performance using a Sinc
3
filter with a programmable
sample rate. The ADC also has a selectable filter that
allows for high-resolution single-cycle conversion.
The microcontroller core is 8051 instruction set
compatible. The microcontroller core is an optimized 8051
core that executes up to three times faster than the
standard 8051 core, given the same clock source. That
makes it possible to run the device at a lower external clock
frequency and achieve the same performance at lower
power than the standard 8051 core.
The MSC1210Yx allows the user to uniquely configure the
Flash and SRAM memory maps to meet the needs of their
application. The Flash is programmable down to 2.7V
using both serial and parallel programming methods. The
Flash endurance is 1 million Erase/Write cycles. In
addition, 1280 bytes of RAM are incorporated on-chip.
The part has separate analog and digital supplies, which
can be independently powered from 2.7V to +5.25V. At
+3V operation, the power dissipation for the part is
typically less than 4mW. The MSC1210Yx is packaged in
a TQFP-64 package.
The MSC1210Yx is designed for high-resolution
measurement applications in smart transmitters, industrial
process control, weigh scales, chromatography, and
portable instrumentation.
ACC
MUX
AGND
+AV
DD
AV
DD
BUFFER PGA
V
REF
Modulator
Up to 32K
FLASH
1.2K
SRAM
SPI
Digital
Filter
8051
SFR
LVD
BOR
PORT1
PORT2
WDT
Timers/
Counters
Clock
Generator
PORT0
PORT3
8
8
8
EA
8
T2
SPI/EXT
USART2
ADDR
ADDR
DATA
Alternate
Functions
USART1
EXT
T0
T1
RW
8−Bit
PGA OffsetAIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AINCOM
AGND REF OUT REF IN+ REF IN
−
DV
DD
DGND
XIN XOUT
ALE
PSEN
RST
POR
Temperature
Sensor
REF
NOTE (1) REF IN
−
must be tied to AGND when using internal V
REF
.
(1)
Figure 8. Block Diagram