Marantz SR5500 Series Service Manual page 47

IC81: NJU3430
N o . S Y M B O L I/O
5 7 V D D - P o w e r S o u r c e
4 9 V - G N D
S S
V F D D r i v i n g P o w e r S o u r s e
4 8 V -
F D P
V
C R O s c i l l a t i o n T e r m i n a l
5 0 O S C I
1
External R and C connect to these terminals.
(Target f
5 1 O S C O
2
Serial Clock Input Terminal
5 4 C L K I The serial data input synchronizing the rise edge of this
terminal.
C h i p S e l e c t T e r m i n a l
5 3 C S I W h e n t h e C S t e r m i n a l i s " H " t h e s e r i a l d a t a i n p u t i s n o t
a v a i l a b l e .
S e r i a l D a t a I n p u t T e r m i n a l
5 5 S I I
T h e d a t a i n p u t i s M S B f i r s t .
Register Selection Signal Input Terminal
5 6 R S I RS="0" : Instruction Register
R S = " 1 " : D a t a R e g i s t e r
R e s e t T e r m i n a l R S T = " L " : R e s e t
- E a c h A d d r e s s
- E a c h R A M D a t a
5 2 R S T I
- D i s p l a y D i g i t s
- C o n t r a s t C o n t r o l
-All Display Off
-All Outputs are "L"
6 1 t o 6 4 , Segment Output Terminals (Internal Pull-down
S to S O
1 3 5
1 t o 3 1 R e s i s t a n c e )
3 2 t o 4 7 T to T O Timing Output Terminals (Internal Pull-down Resistance)
1 1 6
6 0 M K
1
O Icon Output Terminals (Internal Pull-down Resistance)
5 9 M K
2
Output Port Terminal
5 8 P O
1
T h i s t e r m i n a l i s s u i t a b l e f o r L E D .
F U N C T I O N
: V D D = + 3 . 0 t o 5 . 5 V
: V = 0 V
S S
- 2 0 V t o V - 4 5 V
D D D D
= 3 6 0 k H z )
O S C
: (00)
H
: Unfixed
: 1 6 - d i g i t
: 8/16 Dury
R S T
R ESET
Instruction
D ec oder
SI
CS 8bits
Line
Shift
C L K
R e g .
R S
Timing State Address
Gen. Reg.
Read
OSC
1 C R Display
OSC . Control
OSC
2
V
D D
V
S S
V F DP
45
M K R AM Icon
16x2 bit D r i v e r
Address
Counter
C G R AM Segment
35x8 bit D r i v e r
Port
D r i v e r
C G R O M
Selector 8,400bit
D D R A M
Address
16x8 bit
Counter
Timing
D r i v e r
M K M K
1 ~ 2
S ~ S
1 35
P
1
T T
~
1 1 6