GE b30, Technical Reference Manual

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E-PSM(P)W module introduction
1-31
Document no. 2044677-001
4.4.2 NIBP board
Figure 17 NIBP board functional block diagram
Signal processing
Two signals from the pressure transducers are amplified and sent to the A/D converter. After
the converter, digitized signals are sent to the microprocessor for data processing.
The NIBP board is controlled with an H8/3052 microprocessor at 16 MHz oscillator frequency.
Memory
The NIBP program memory (processor flash memory) size is 512k x 8. The processor has 4
kBytes RAM and there is also an external RAM memory, the size of which is 128k x 8. Variable
values of the NIBP measurement are stored into the external RAM. The EEPROM size is 512 x 8
and it is used to store the calibration values for the pressure transducers, the pulse valve
constants gained during measurements, the PC board identification, and the module serial
number.
P r e s s u r e
s e n s o r s
P
S
M
_N
IB
P
_bl
ockd
iag.
vsd
P a t ie n t a n d N I B P c u f f
N I B P c u f f h o s e
N I B P c o n n e c t o r w it h N I B P h o s e
id e n t if ic a t io n
D r iv e r s f o r
p u m p & v a lv e s
S a f e t y C P U
M a in C P U
N I B P
c o n t r o l
k e y s
R S 4 8 5
c o m m u n ic a t io n
P o w e r s u p p ly
+ 5 V a n d
s y n c h r o n iz a t i o n s ig n a l
f o r E C G - a n d
S T P - b o a r d s
M o d u le b u s c o n n e c t o r
N I B P p n e u m a t ic s ( m a n if o ld )
N V m e m o r y
N V m e m o r y
f o r c o n t in u e d
p a t ie n t d a t a
P u m p