marquette hellige MicroSmart - Printed Circuit Board (PCB) Microsmart

Marquette Hellige GmbH MicroSmart V 2.xx Page 10
Servicing Instructions 227 470 35 B - 97.12
3.3 Printed circuit board (PCB) MicroSmart
The PCB MicroSmart holds the entire electronics of the unit. The electronics comprise the following
function groups:
- Voltage
supply and monitoring
On-Off electronics
Battery charge
Input voltage monitoring
Voltage supply +5V
- Computer
Controller (Motorola 68332)
EPROM 512KByte
RAM 256KByte (MicroSmart) or 512KByte (MicroSmart MC)
Configuration memory (EEPROM) 256Byte
Reset Generation
Alarm signal output
Real-time clock, buffered
Keyboard interface
IR interface (MicroSmart MC only)
-ECG
recording and pre-processing (floating side)
- Protective input circuit
- Pre-amplifier
- AD converter
- PACE identification
- Electrode label
- Conductor label
- Filter and interface module
- Current supply
- Reference edit
- Drive
electronics and display
Array control
Temperature monitoring
Motor control
Voltage supply +24V
Photoelectric barrier analysis