1 - 5
Theory of Operation
Hardware Structure
1.4.1
Main Board
FIGURE 1-4 shows the main board, which provides resources and support for the overall
system. It controls the LCD, LED, keyboard, speaker, and recorder. It also communicates with
parameter modules and connectors. The main board also controls communication with the
speaker, the recorder, and all external connectors.
FIGURE 1-4
Main Board Principle Diagram
The main board communicates with all parameter modules and the recorder through an
FPGA extended serial port.
The main board supplies information using FPGA to the key and display board. It drives the
display, detects the keys, and implements the user interface.
The main board controls the alarm indicator using FPGA.
The main board controls the speaker to give audible alarms, key tones, and Pitch Tone.
The main board provides the nurse call connection, network connection, and R232
connection.
The real-time clock is implemented by the RTC chip. The RT clock is powered by the AC
mains, battery, or button cell on the main board. The button cell ensures the continuous
working of the clock in the event that the AC mains and batteries are not available.
SDRAM stores running program instructions and data temporarily. The system memory and
trend data memory is flashed. The device configuration memory is EEPROM.
CPU
WATCHDOG
PHY RTL8201
RTC
E2 PROM
RS232 IC
FLASH
SDRAM
LINEAR POWER
AUDIO PROCESS
CIRCUIT
FPGA
NURSE CALL
ETHERNET
SPEAKER
3.3V
LCD
1.5V
5.0V
12V
LED
KEY
SERIAL PORT 0
RS232
SERIAL PORT 1:
NIBP
SERIAL PORT 2:
SpO
2
SERIAL PORT 3:
TEMP
SERIAL PORT 4:
RECORDER
Summary of Contents for Rosebud Accutorr V
Page 1: ...USER MANUAL Vital Signs Monitor...
Page 125: ...0070 00 0702 Rev 7 0 October 2015...
