Yamaha DME4io-ES Service Manual page 30

DME4io-ES/DME8i-ES/DME8o-ES
RTC-4543SA RTC (X2548A00)
CPU: IC013
Real Time Colck
GND FOUT
1 14
N.C. 2 13 N.C.
CE N.C.
3 12
FSEL DATA
4 11
WR 5 10 CLK
FOE V
6 9 DD
N.C. 7 8 N.C.
MAX3221CPWR (X2757A00)
GPI: IC601
Single-channel RS-232 Line Driver/Receiver
EN FORCEOFF
1 16
C1+ Vcc
2 15
Auto-
powerdown
V+ GND
3 14
C1– DOUT
4 13
C2+ FORCEON
5 12
C2– DIN
6 11
V– INVALID
7 10
RIN
8 9 ROUT
5kΩ
CY2302SXC-1T (XW492A00)
Clock Generator
ES: IC003
FBIN 1 8 VDD
IN 2
7 OUT2
GND 3
6 OUT1
FS0 FS1
4 5
30
32.768kHz
OSC DIVIDER
FOUT
14
OUTPUT
4
FSEL
CONTROLLER
FOE 6
DATA
11
I/O
CLK
10
CONTROLLER
WR 5
CE
3
EACH DRIVER
INPUTS
VALID RIN
DIN FORCEON FORCEOFF
RS-232 LEVEL
X X L
L H H
H H H
L L H
H L H
L L H
H L H
H=high level, L=low level, X=irrelevant, Z=high impedance
EACH RECEIVER
INPUTS
OUTPUT
VALID RIN
RIN EN ROUT
RS-232 LEVEL
L L X H
H L X L
X H X Z
Open L No H
FBIN
1
FS0
4
N
FS1
5
PHASE CHARGE
IN
2
DETECTOR
PUMP
LOOP
FILTER
OUTPU T
VCO
BUFFER
OUTPU T
2
BUFFER
CLOCK AND CALENDAR
SHIFT REGISTER
VOLTAGE
DETECT
CONTROL
CIRCUIT
OUTPUT
DRIVER STATUS
DOUT
X Z Powede off
X H
Normal operation with
auto-powerdown disabled
X L
Yes H
Normal operation with
auto-powerdown enabled
Yes L
No Z
Powered off by
No Z auto-powerdown feature
H=high level, L=low level, X=irrelevant,
Z=high impedance (off), Open=disconnected
input or connected drive off
VDD
7
GND
3
OUT1
6
OUT2
8
SN74AHC1G125DCKR (X3764A00)
DSP: IC002
Buffer Gate
OE 1 5 V
A 2
GND 3 4 Y
SN74AHC1G08DCKR (X3833A00)
CPU: IC015
ENT2: IC114
Single 2-Input Positive-AND Gate
A 1 5 Vcc
2
B
3 4
GND Y
FUNCTION TABLE
INPUTS OUTPUT
A B Y
H H H
L X L
X L L
TC7SH08FU (TE85L, JF) (XR680A00)
ENT2: IC114
2 Input AND Gate
Vcc
IN B
1 5
IN A
2
GND 3 4 OUT Y
TC7SH00FU (TE85L, F) (X7285A00)
DC: IC102
2 Input NAND Gate
Vcc
IN B
1 5
IN A
2
3 4
GND OUT Y
CC