Samsung DVD-A500 Service Manual page 53

Circuit Descriptions
6-3 System Control
6-3-1 Outline
The main micom peripheral circuit is composed of 16bit Micom (MIC1 ; TMP93CM41F), 8M EPROM (MIC8 ; AM27-
C080) for Microcode and data save, 512 byte EE-PROM (MIC5 ; KS24C020) for permanent storage of data needed at
power off, MIC4 (74AC573) to latch only address in the bus where address and data are mixed, address decoder
(MIC7 ; 74HC00) for selection of ex-ternal device chip and 20MHz clock oscillator for micom operation. The Micom
(MIC1 ; TMP93CM41F) mounted in main board analizes the key commands of front panel or instructions of remote
control through communication with Micom (FIC1 ; LC86P6232) of front and controls the devices on board to exe-
cute the corresponding commands after initializing the devices connected with micom on board at power on.
6-3-2 Block Diagram
AIC41 AIC3
A/C CONV. CODEC
AK4324 CS4226
FIC1
FRONT MICOM
LC86P6232
MICOM
BLOCK
6-8
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AIC1 RIC1
AUDIO DECODER RF AMP
CS4926 KS1461
MIC7
ADDR DECODER
74HC00
MIC5
EEPROM
KS24C020
HIGH ADDRESS
Fig. 6-13
SIC1 DIC1
DIGITAL SERVO DATA PROCESSOR
KS1452 KS1453
MIC1
MAIN MICOM
TMP93CM41F
DATA BUS
MIC8
EPROM
AT27C080
VIC1 TIC1
A/V DECODER VIDEO ENCODER
ZIVA-3 SAA7128
MIC2
ADDR LATCH
74AC573
LOW ADDRESS
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