ZOLL Propaq MD Rev A - Manual (Page 92)

C HAPTER 5 F UNCTIONAL D ESCRIPTION
88 9650-0807-01 Rev. A
Main Processor (MP)
The Main Processor (MP) section controls the user interface, connectivity needs, as well as data
logging, printing, and general system control. It consists of the CPU, program memory Flash
and SDRAM, Communication with modules/circuits: USB Client, USB Host, Debug Ports
(JTAG,Serial), Storage memory for 24 hour disclosure data, Internal VGA display and interface
circuit, LED indicators, Key Pad, and Audio circuit. The MP also controls the real-time clock
and interface to the power controller processor, battery and charger.
Patient Processor (PP)
The Patient Processor (PP) circuitry supports the data acquisition, signal processing and
conditioning, analysis and control algorithms required for the physiological sensors. The PP
also controls the defibrillation and pacing circuitry. It consists of the processor, program
memory Flash and SDRAM as well as interface circuitry to physiological sensor modules/
circuits.
Power Controller (PC)
The Power Controller (PC) micro-controller controls the power sequencing to turn the device
on and off when the power switch is pressed. It also communicates to the battery charger and
battery via a serial SPI bus. Additionally, the PC controls the Status LCD and communicates
battery and charger status to the MP.
Peripherals Interface
The Communications Processor (CP) is connected to various peripherals:
• MP
• Host Power Control
• USB
• Wifi
• Bluetooth
• GPS
• Expansion FLASH Storage
MP - The CP is connected to the MP via several communication links. The primary link is a
high-speed UART with several GPIO lines for general signaling. Additional provision has been
made for connection with an SPI link that would operate in parallel to the UART. The CP can
perform message-based communication with peripherals that are connected to the MP, such as
the PP, the real-time clock and power controller through the MP.
Host Power Control - The CP uses the Host systems' power controller - HC08 - for system
power state information. This link consists of several GPIO lines. This link provides
information about the connected power sources, imminent shutdown and handshaking.
USB - The USB interface on the CP provides a means to connect USB memory sticks and USB
Cellular Modems.
Wifi - The Wifi interface on the CP is provided over an SDIO interface with auxiliary GPIO
lines for control. This provides the capability for communication with a/b/g/n 802.11 devices.
Collectively, this interface allows the CP to control power, scan for available networks and to
select/deselect a desired connection.