Real Time Clock - Yamaha DM2000 Service Manual

DM2000
CY2305 (XY937A00)
CPU: IC114
Clock Buffer
Block Diagram
PLL
1
REF
S2
Select Input
Decoding
S1
UPC319G2 (IG156700)
JK: IC303
Voltage Comparator
1
NC 14
2
13
NC
3
12
GND1
4 11
+INPUT1
+
-
5 10
-INPUT1
6
-V
OUTPUT2
7
NJM2904V (TE1) (XR532A00)
CPU: IC139
FD1: IC112, 113, 137
FD2: IC109, 110, 126
SUB: IC136
Dual Operational Amplifier
Output A
1
Inverting
2
Input A
- +
Non-Inverting
3
+ -
Input A
Ground
4 -V
74
8
CLKOUT
MUX
3
CLKA1
2
CLKA2
5
CLKA3
7
CLKA4
3
CLKB1
2
CLKB2
5
CLKB3
7
CLKB4
RTC-62423 (X0333A00)
CPU: IC128

Real Time Clock

STD. P
NC
OUTPUT1
OUTPUT1
+V
-INPUT2
9
+INPUT2
8
GND2
NJM2068L-D (XM356A00)
2TRI: IC101, 102 PHN: IC202
ANI: IC100, 102, 103
SML: IC302 STD: IC302
NJM4556AL (XP844A00)
PHN: IC201 ANI: IC101
DA1: IC102, 202, 302, 402, 502, 602,
LRG: IC101, 201 SML: IC301, 401
+DC Voltage
+V 8
Supply ST: IC101, 201
Output B
7
Dual Operational Amplifier
Inverting
6
Input B
Non-Inverting
5
Input B
OUT
1
8
REF CLK OUT
CLK2 2 7
CLK4
3
CLK1 6
VDD
4
GND 5
CLK3
1 V
24
DD
(V )
CS 2 23
DD
0
(V )
NC 3
22 DD
NC
ALE 4
21
A
0 5
20 CS
1
NC 6
19
D
0
A
1 7 18
NC
NC 8 NC
17
A 9 16
2 D
1
A 10 15
3
D
2
READ 11
14
D
3
12 13
GND WRITE
702, 802
STD: IC301, 401
A B
- -
1 2 3 4 5 6 7 8
-IN +IN -V +IN -IN OUT +V
A A A B B B
Pin No. Signal Function
1 REF Input reference frequency, 5V-tolerant input
2 CLK2 Buffered clock output
3 CLK1 Buffered clock output
4 GND Ground
5 CLK3 Buffered clock output
6 VDD 3.3V supply
7 CLK4 Buffered clock output
8 CLKOUT Buffered clock output, internal feedback on this pin
NJM2068V (TE1) (XT618A00)
FD1: IC133-136
FD2: IC122-125
NJM4560M (T1) (XA862B00)
JK1: IC302
µPC4570G2 (XF291A00)
AD: IC101, 102, 201, 202, 301, 302,
401, 402, 501, 502, 601, 602
DA1: IC101, 201, 301, 401, 501, 601,
701, 801
DA2: IC101, 102, 151, 201, 251, 301, 351,
401, 451, 501, 551, 601, 701, 801
Dual Operational Amplifier
Output A
1
Inverting
2
Input A - +
Non-Inverting
3
+
Input A
-DC Voltage Supply
4 -V
+DC Voltage
+V 8
Supply
Output B
7
Inverting
6
-
Input B
Non-Inverting
5
Input B