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Microcontroller Unit
The main device on the MASTER PCB is the 16-bit MICROCONTROLLER unit MC68HC05B16 from
MOTORola
for the models EKTAPRO 4020 - 9020 and 9029/CINE
This MICROCONTROLLER has a microprocessor, timer, memory, analog/ digital converter and input/output ports
on one chip. Compared to a standard processor, where for each item a peripheral IC is necessary.
This MICROCONTROLLER with its on-chip software controls all functions of the projector plus peripheral circuits.
The main features of the MICROCONTROLLER are:
- 24 bi-directional I/O lines
- 8 input-only lines
- serial communication interface system
- 8 channel A/D converter
- 15120 Bytes ROM (Models 4020 - 9020 and 9020/CINE)
- 2 channel timer
The following block diagram shows the internal MICROCONTROLLER functions.
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2/ECLK
PC3
PC4
PC5
PC6
PC7
TCMP1
TCMP2
TCAP1
TCAP2
RDI
SCLK
TDO
PLMA D/A
PLMB D/A
PD0/AN0
PD1/AN1
PD2/AN2
PD3/AN3
PD4/AN4
PD5/AN5
PD6/AN6
PD7/AN7
VRH
VRL
VSS
VDD
OSC1
OSC2
IRQ
RESET
VPP1
PORT APORT B
PORT D
PLM
SCI
352 bytes
static RAM
496 bytes
self check ROM
256 byte
EEPROM
MC68HC05B16 (15120 bytesROM)
Model 4020 - 9020 and 9020/CINE
Charge pump
COP watchdog
Oscillator
÷2 / ÷32
M68C05
CPU
8-bit
A/D converter
16-bit
timer
PORT C
figure 3-2
SM 2547-1 Service Manual
Kodak AG, Stuttgart 3-3 03/98