AM-400 (serv.man5). Chapter 5 (Circuit Description). - Sharp Copying Equipment Service Manual (repair manual). Page 7

AM-400DE

5 – 7

4) FM336Plus (IC18) Terminal description

The speaker amplifier (IC17) outputs the buzzer and ringer sound gen-
erated by Main CPU (IC1).

1

—

RESERVED

NC

51

—

RESERVED

NC

2

IA

RS2

HOST Interface

52

GND

VSUB

—

3

IA

RS3

HOST Interface

53

GND

VSS

—

4

IA

RS4

HOST Interface

54

—

NC

NC

5

IA

/CS

OHOST Interface

55

—

NC

NC

6

IA

/WR

HOST Interface

56

MI

SLEEP

Modem Interconnect

7

IA

/RD

HOST Interface

57

PWR

VDD1

—

8

OA

/RDCLK

DTE Serial Interface

58

—

NC

NC

9

OA

/RLSD

DTE Serial Interface

59

—

RESERVED

NC

10

OA

TDCLK

DTE Serial Interface

60

—

RESERVED

NC

11

IA

TXD

DTE Serial Interface

61

MI

SR1IO

Modem Interconnect

12

OA

/CTS

DTE Serial Interface

62

PWR

VCORE

—

13

PWR

VDD1

—

63

PWR

VDD1

—

14

—

RESERVED

NC

64

IA

XTCLK

DTE Serial Interface

15

—

RESERVED

NC

65

GND

VSS

—

16

GND

VSS

—

66

—

RESERVED

NC

17

—

NC

NC

67

OA

RXD

DTE Serial Interface

18

IA

/RESET

Modem Interconnect

68

IA

/DTR

DTE Serial Interface

19

OA

SR4OUT

Modem Interconnect

69

PWR

VDD1

—

20

—

NC

NC

70 

MI

IA SLEEP

Modem Interconnect

21

IA

SR4IN

Modem Interconnect

71

PWR

VGG

—

22

OA

CLK OUT

Modem Interconnect

72

OA

YCLK

Overhead Signal

23

OA

EYESYNC

Diagnostic Signal

73

OA

XCLK

Overhead Signal

24

OA

EYECLK

Diagnostic Signal

74

OA

EYEXY

Diagnostic Signal

25

GND

MAVSS

—

75

OA

/DSR

DTE Serial Interface

26

PWR

MAVDD

—

76

OA

/RI

Telephone Line Interface

27

O(DF)

SPKR

Telephone Line Interface

77

IA

RINGD

Telephone Line Interface

28

O(DD)

TXA2

Telephone Line Interface

78

IA

/RTS

DTE Serial Interface

29

O(DD)

TXA1

Telephone Line Interface

79

OA

IRQ

HOST Interface

30

MI

VREF

Modem Interconnect

80

GND

VSS

—

31

MI

VC

Modem Interconnect

81

MI

GP00

Modem Interconnect

32

I(DA)

RIN

Telephone Line Interface

82

—

RESERVED

NC

33

AGND

MAVSS

—

83

—

RESERVED

NC

34

IA

/POR

Modem Interconnect

84

PWR

VDD1

—

35

—

RESERVED

NC

85

I

XTALI/CLKIN

Overhead Signal

36

—

RESERVED

NC

86

O

XTALO

Overhead Signal

37

O(DD)

/TALK

Telephone Line Interface

87

IA/OB

D0

HOST Interface

38

PWR

VDD

—

88

IA/OB

D1

HOST Interface

39

—

RESERVED

NC

89

IA/OB

D2

HOST Interface

40

—

RESERVED

NC

90

IA/OB

D3

HOST Interface

41

—

NC

NC

91

IA/OB

D4

HOST Interface

42

IA

M CNTRL SIN Modem Interconnect

92

PWR

VDD1

—

43

IA

M CLKIN

Modem Interconnect

93

IA/OB

D5

HOST Interface

44

IA

M TXSIN

Modem Interconnect

94

IA/OB

D6

HOST Interface

45

IA

M SCK

Modem Interconnect

95

IA/OB

D7

HOST Interface

46

IA

M RXOUT

Modem Interconnect

96

IA/OB

RS0

HOST Interface

47

IA

M STROBE

Modem Interconnect

97

IA/OB

RS1

HOST Interface

48

—

RESERVED

NC

98 PWR

PLL 

VDD

—

49

O(DD)

OH

Telephone Line Interface

99

GND

VSS

—

50

PWR

VDD

—

100

GNDPLL GND

—

Notes:
1. I/O types:                      MI:              Modem interconnect                IA, IB:Digital input                    O(DD), O(DF):Analog input
                                         I(DA):          Analog input                             OA, OB:Digital output
2. NC= No external connection required. RESERVED= No external connection allowed.
3. Interface Legend:
          HOST= Modem Control Unit (Host)
          DET= Data Terminal Equipment