Technical Supplement
S- 11
There are 11 buttons on the display panel: the ON/STANDBY button (SW1)
and the AUDIBLE ALARM OFF button (SW2) are connected directly to the
UIF/Power Supply module. All the buttons except the ON/STANDBY button
are connected to an input matrix of PIC microprocessor U3. The PIC is
responsible for communicating with the UIF.
U3 is used to indicate a button change of state. The buttons are input
through a matrix form to the PIC. The PIC will recognize when a button is
pressed or released and request an HC16 interrupt on the UIF/Power Supply.
When the HC16 responds by initiating a serial communication, the PIC
inputs this information to the HC16. Although the PIC requests a serial
communication link, it has no other control over the communications.
The J1 connector pin-outs are as follows:
1
+5V power for display drivers
2
+5V power for display drivers
3
Enable for PIC microprocessor
4
Serial clock to display drivers
5
Load data to display drivers
6
Serial data to display drivers
7
N/C
8
Audible alarm off
9
ON/Standby button signal
10
N/C
11
PIC Interrupt
12
+5 volts for green LED
13
Ground
14
Ground
S.5
SCHEMATIC DIAGRAMS
The following schematics and part locator diagrams are included in this
section:
Figure
Description
Figure S5-1
Display PCB Part Locator Diagram
Figure S5-2
UIF PCB Part Locator Diagram
Figure S5-3
Display PCB Schematic Diagram
Figure S5-4
UIF PCB Schematic Diagram
Figure S5-5
Upper Docking Connector PCB Schematic Diagram
Figure S5-6
Lower Docking Connector Board Schematic Diagram
Figure S5-7
Blood Pressure PCB Schematic Diagram
