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3 - 1
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Q U B E
Theory
CPU PCB
The CPU PCB combines the CPU core, power supplies, Li-Ion battery
charger, touchscreen interface, USB subsystem, ATI ES1000
graphics processor and all other I/O interfaces (refer to
on page 3-1). The Freescale MPC8270 running vxWorks Real Time
Operating System (RTOS) interfaces via 64-bit local bus to Flash,
SDRAM, SRAM, and Non-Volatile Memory (NVRAM). The application
code is stored in FLASH and loaded into SDRAM at run time.
NVRAM is used to store monitor configuration data and backed up
by an internal battery in the IC and also provides a real-time clock
function.
Figure 3-1 CPU Core Processing
MPC8270 CPU
SCC2
SDLC
PFAIL
CPU PCBA
670-1573-xx
E-NET
Controller/
Transceiver
E-NET
SMC1
SCC3
5-WIRE RESISTIVE
TOUCHSCREEN
CONTROLLER
DRIVERS
+3V
TOUCHSCREEN
P341
ALARM
CONTROL
EXT. ALARM RELAYS
F440 (0.35A)
PCI
ALARM 2
ALARM 1
ALARM 0
SERIAL PORT
SMC2
PCI SUBSYSTEM
32-BIT
I2C
I2C BUS
I/O
LOGIC-LEVEL
DRIVERS
J941
YELLOW
RED
CYAN
RS232 XCVR
ETHERNET
PWR_RX_TX
TO LCD/ BEZZEL ASSY
RC RX/TX
INTERNAL NURSE ALERT
+12V
GND
ENB
+3.3V
SPI
MISC I/O
J1
EXT NURSE
ALERT
I2C BUS
DOCKED*
64-BIT
32 MB
FLASH ROM
64 MB
SDRAM
2 MB SRAM
(GDS)
SUPERCAP
BATTERY
BACKUP
+3V
CPU CORE
VOLTAGE REG
+3.3V
+1.2V
Local Bus
Local
Bus
128 x 8 MB
NV RAM / RTC
ETHERNET
USB (7-PORT HUB)
I2C BUS
I2C BUS
FPGA PGM
SPI BUS
TO LCD/ BEZZEL ASSY
DOCKED*
SDLC
+1.5V
+1.8V
SDLC TO INTERCONNECT PCBA
-12V
+3.3V
+5V
+12V
+18V
FROM POWER SUPPLY
“ALWAYS ON” CPU
TO SYSTEM
FAILURE ALARM
WD_MAIN
TO/FROM
MON-DOCK PCBA
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