Medical Applications User Guide (pdf) - Freescale Semiconductor

Diagnostic and Therapy Devices
Power management and wireless
communication blocks are explained in
Chapter 3, Telehealth Systems.
10.6
Display Driver and Touch
Screen Controller
An LCD screen shows graphically the heart’s
electrical signals and allows for a diagnosis of
any cardiac anomalies or other problems. A
touch screen offers developers an easy way to
enhance their applications with touch-based
user interfaces.
Connecting screens to the MCF5227x is
shown in Figure 10-12.
For more information about these
connections, see the MCF5227x reference
manual and application notes about touch
screens and LCD memory, available at
freescale.com.
10.7
Enhanced Multiply-
Accumulate (eMAC)
Module
A ColdFire or Kinetis MCU such as the
MCF5227x, MCF51MM256 or MK53N512 can
process the digital signals of the heartbeat,
avoiding the need to use a separate DSP
or DSC.
The eMAC design provides a set of DSP
operations that can improve the performance
of embedded code while supporting the
integer multiply instructions of the baseline
ColdFire architecture.
The ColdFire family supports two MAC
implementations with different performance
levels and capabilities. The original MAC features
a three-stage execution pipeline optimized for
16-bit operands with a 16 x 16 multiply array
and a single 32-bit accumulator. The eMAC
features a four-stage pipeline optimized for
32-bit operands with a fully pipelined 32 × 32
multiply array and four 48-bit accumulators.
Figure 9-11: 10-11: MCF522x MCF522x Family Family Block Block Diagram Diagram
12-bit color
16-bit color
LCD
Controller
Figure 10-13: Typical DSP Chain
Figure 9-13: Typical DSP Chain
Analog
Low-Pass
Filter
BDM PLL CCM GPIO JTAG
USB OTG EPORT SSI
8 KB Cache
Sample
and Hold
ADC
60 Medical Applications User Guide
ASP
Digital
Filters
SW/HW on ColdFire
INTC I 2 C
LCDC RTC DSPI
32-bit
4 DMA Timers
EMAC
2-ch.
4 PWM
ColdFire V2
Core
XBS FlexCAN
2 PIT 3 UART
DC/PWM
DC/PWM
128 KB SRAM
System
Integration
Debugging/Interface Peripherals Flash RAM Core Plus Feature
Figure 9-12: 10-12: Screen Screen Connection Connection on MCF5227x on MCF5227x
MPU
Red bus
Green bus
Blue bus
6
6
6
Horizontal Sync
Vertical Sync
Pixel Clock
Output Enable
I2C/ADC Channel
Touch Screen Controller
RGB Screen
with Touch Screen
Analog
Low-Pass
Filter
Analog
Low-Pass
Filter