Ic Internal Diagrams - Teac DV-R101 Service Manual

IC INTERNAL DIAGRAMS

I.C PIN DESCRIPTIONS (FIP DRIVER : LC75725E) : IC52
PIN No PIN Name
1,13 VFL
60 VDD
57 VSS
59 OSCI
58 OSCO
61 BLK
63 CL
64 DI
62 CE
2 to 12 G1 to G11
56 to 34 S1 to S23
PIN ASSIGNMENTS(TOP VIEW)
I/O
Driver block power supply connection.(Both pins must be conneted)
-
Logic block power supply connection. Provide a voltage between 4.5 and5.5V
-
Power supply connection. Connect to the ground
-
I
Osillator connection. An oscillator circuit is formed by connecting an external
resistor and capacitor to these pins
O
Display off control input
BLK = Low(VSS)...Display off. (S1 to S43 and G1 to G11 at V F L level)
I
BLK = High(VDD)...Display on.
Note that serial data can be transferred while the display is turned off
Serial data transfer inputs. These pins must be connected to the system
microcontroller
I CL : Synchronization clock
DI : Transfer data
CE : Chip enable
digit outputs. These pins are P-channel open drain outputs with pull-down resistors
O
segment outputs for displaying the display data transferred by serial data input.
O
These pins are P-channel open drain outputs with pull-down resistors.
Function
BLOCK DIAGRAM
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