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IC804 DS1302Z
IC806 MB3800PNF
IC506 MPC18A20VM
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IC BLOCK DIAGRAMS – MAIN (2/3) SECTION –
21
22
23
24
25
26
2728
29
30
16
17
1819
20
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
CONTROL
LOGIC
CHARGE PUMP
SAW
SAW
CLK
OSC
EFM
LOGIC
BIAS
VREF
PRE
DRIVER
VREF
COMP
COMP
+
PRE DRIVER
SAW
EN ENB
OP
RF
SS
DTC
NC
PGNDLG
VB
VIN
VIH
VGH
CIL
VCC
CK
COSC
MODE 1
MODE 2
INM
ERRID
ERRIV
GND
VSET
VG
VGL
PGNDG
PGNDB
HA
HB
PGNDA
GND
EFM
VERF
2
3
4
1
7
6
5
8
OSCILATOR
AND DIVIDER
VCC2
X1
X2
GND
REAL TIME
CLOCK
COMMAND AND
CONTROL LOGIC
INPUT CHIFT
REGISTERS
VCC1
SCLK
I/O
RST
DATA BUS
ADDRESS BUS
RAM
±
±
+
_
1
2
3
4
8
7
6
5
REFERENCE
VOLTAGE
SOFT START
S.C.P.
ERROR
AMP
SAW-WAVE
GENERATOR
OUTPUT
DRIVE
CONTROL
CIRCUIT
1.25V
0.5V
500
36K
0.1V
DTC 0.6V
0.3V
30K
FB
OSC
GND
OUT
-IN
SCP
VCC
BR/CTL