DRM101 Datasheet, PDF (25/56 Pages) Freescale Semiconductor, Inc – Blood Pressure Monitor Using the Flexis QE128 Family

Hardware Description
Freescale Semiconductor’s MPR083 proximity-capacitive touch sensor controller is designed to detect the
state of capacitive touch pads. The MPR083 offers designers a cost-efficient alternative to mechanical
rotary switches for control panel applications.
The MPR083 uses an IIC interface to communicate with the host which configures the operation, and an
interrupt to advise the host of status changes. The MPR083 also includes a piezo sounder drive which
provides audible feedback to simulate mechanical key clicks.
MPR083 features:
• 1.8 V to 3.6 V operation
• 150 µA average supply current
• 35 µA low power mode
• Variable low power mode response time (10 ms–10 s)
3.5 MR2A16A Asynchronous Magnetoresistive RAM
The MR2A16A is a 4,194,304-bit magnetoresistive random access memory (MRAM) device organized as
262,144 words of 16 bits. The MR2A16A is equipped with chip enable (E), write enable (W), and output
enable (G) pins, allowing for significant system design flexibility without bus contention. Because the
MR2A16A has separate byte-enable controls (LB and UB), individual bytes can be written and read.
MRAM is a nonvolatile memory technology that protects data in the event of power loss and does not
require periodic refreshing. The MR2A16A is the ideal memory solution for applications that must
permanently store and retrieve critical data quickly.
MR2A16A features:
• Single 3.3 V power supply
• Commercial temperature range (0 °C to 70 °C)
• Flexible data bus control — 8-bit or 16-bit access
• Equal address and chip-enable access times
• Automatic data protection with low-voltage inhibit circuitry to prevent writes on power loss
• All inputs and outputs are transistor-transistor logic (TTL) compatible
• Full nonvolatile operation with 10 years minimum data retention
3.6 MC9S08JM60 Microcontroller
The MC9S08JM60 series MCUs are members of the low-cost, high-performance HCS08 family of 8-bit
microcontroller units (MCUs). The JM family features a fully-compliant full-speed USB 2.0 device
peripheral, which enables users to connect to a PC or any other USB host.
MC9S08JM60 features:
• 48 MHz CPU frequency
• 2.7 V to 5.5 V operating voltage
• 60 KB of on-chip flash
Blood Pressure Monitor Design Reference Manual, Rev. 0
Freescale Semiconductor
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