Kodak 9020/CINE service manual Microcontroller Unit

SM 2547-1 Service Manual

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.

256 byte

EEPROM

VPP1 Charge pump

MC68HC05B16 (15120 bytesROM)

Model 4020 - 9020 and 9020/CINE

RESET	COP watchdog
IRQ
OSC2	Oscillator
OSC1
	÷2 / ÷32
VDD	M68C05
VSS	CPU

496bytes

self check ROM

352bytes static RAM

PORT A

PORT B

PORT C

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

PD0/AN0 PD1/AN1 PD2/AN2 PD3/AN3 PD4/AN4 PD5/AN5 PD6/AN6 PD7/AN7

VRH VRL

PORT D

8-bit

A/D converter

16-bit timer

SCI

PLM

TCMP2

TCAP1

TCAP2

RDI

SCLK

TDO

PLMA D/A PLMB D/A

figure 3-2

Kodak AG, Stuttgart 3-3 03/98