Read Sharp ER-A570 (serv.man5) Service Manual online
3) Block diagram
D7
D6
D5
D4
D3
D2
D1
D0
DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
Data bus buffer
WRO
RDO
RES
W
R
RES
Read/write
control
control
A5
A4
A3
A2
A1
A0
SL00
CS0
Decorder
control
control
SL01
SL02
SL10
SL11
SL12
SL20
SL21
SL22
SL30
SL31
SL32
TRV
USICH
CS3
CS2
CS1
C
hanel
s
e
le
c
t c
ont
rol
CHSL
PX
TO/FROM USART
RX
D
A
T
A
0
TX
E
X1
X2
XO
U
T
TB
C
K
Inline
cont
cont
OCS
TCR0
Timer0 control
Timer0
RCVDT0
TCR1
Timer1 control
Timer1
RCVDT1
TCR2
Timer2 control
Timer2
RCVDT2
TCR3
Timer3 control
Timer3
RCVDT3
RTS CNT
RTS1
RTS0
PO
F
F
RS
RQ
T
RRQ
TR
Q
1
TR
Q
2
Power
supply
cont.
supply
cont.
RCVRDY3
RCVRDY2
RCVRDY1
RCVRDY0
TRNEMP3
TRNEMP2
TRNEMP1
TRNEMP0
Interrupt control
CI
0
CI
1
CI
2
CI
3
/P
2
I
CD
0
CD1
CD2
CD
3
/P
0
CT
S
0
CT
S
1
CT
S
2
CT
S
3
/P
1
BR
K0
BR
K1
BR
K3
T
RNRDY
0
T
RNRD
Y
1
T
RNRD
Y
2
T
RNRDY
3
AB1
AB0
4 22
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