Analog Pcb - Dräger 8000 IC Function Description

TIMER module 4 enables timer functions and may be operated with internal and several
external clock pulses.
A battery-buffered REAL TIME CLOCK 5 provides time and date (not fitted for Incubator 8000
series).
3.2.5.3 Detailed description
The CPU Standard 2 PCB or the CPU Incubator PCB is a microprocessor system featuring the
microprocessor 6802, which contains the entire data and program storage area and various
peripheral modules. Voltage monitoring and watchdog logic are also provided (CPU Standard
2 PCB only).
The address, data and control lines of the CPU are connected to the operating voltage by way
of pull-up resistance networks, so as to obtain level matching with respect to the subsequent
HCMOS modules. The address and control lines are buffered directly at the CPU with D2, D3
and D5 in order to enable the assembly to be operated in DMA mode. These driver modules
are controlled by the signal BA.
The address decoder consists of the programmable module D6 and the subsequent decoder
D7. Chip select signals for the memory modules D8 to D12 and one select signal each for the
internal I/O modules, the external I/O modules and the data bus driver are generated in D6.
The programmability of D6 makes it possible - together with the jumper fields X2 to X5, X8 - to
have extremely flexible assembly with various memory modules. The signal BA at D7 is used
to prevent an external CPU (DMA mode) having memory access to the I/O modules.
The timer module D13 can be operated with an internal and an external clock pulse. One of
the three clock pulses 100 Hz, 1 kHz, 10 kHz can be supplied to each clock input C1, C2, C3
via the jumper field X6. The three gate inputs G1, G2. G3 and the timer outputs Q1, QZ, Q3
are routed to the printed circuit board connector X1.
3.2.6

Analog PCB

3.2.6.1 Intended use
Three different versions of the Analog PCB are available:
82 00 770
82 00 920
82 90 680
6141.22X Incubator 8000 IC/SC/NC
Without skin temperature measurement
With skin temperature measurement (1 channel). For software version
10.n and 20.n only.
With skin temperature measurement (2 channels for Thermomonitoring).
For software version 11.n and 21.n only.
Function Description
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