DV-720H (serv.man19). IC Function List - Sharp DVD Service Manual (repair manual). Page 12

SDRAM Interface (35 pins)

Pin No.

Pin name

Type

Direction

Function

87

RAMDAT[15]

3-S

I/O (r.t.)

Reset: input (p.d.)

84

RAMDAT[14]

Standby: 3-S (p.d.)

81

RAMDAT[13]

78

RAMDAT[12]

75

RAMDAT[11]

72

RAMDAT[10]

69

RAMDAT[9]

65

RAMDAT[8]

67

RAMDAT[7]

71

RAMDAT[6]

73

RAMDAT[5]

76

RAMDAT[4]

79

RAMDAT[3]

82

RAMDAT[2]

85

RAMDAT[1]

88

RAMDAT[0]
SDRAM bidirectional data bus.

52

RAMADD[11]

O

O (p.d.)

Reset: output

50

RAMADD[10]

Standby: 3-S

51

RAMADD[9]

48

RAMADD[8]

45

RAMADD[7]

43

RAMADD[6]

40

RAMADD[5]

38

RAMADD[4]

39

RAMADD[3]

42

RAMADD[2]

44

RAMADD[1]

47

RAMADD[0]
SDRAM address bus output.

57

RAMRAS#

O

O (p.u.)

Reset: output
Standby: 3-S (p.u.)

SDRAM row select output.

58

RAMCAS#

O

O (p.u.)

Reset: output
Standby: 3-S (p.u.)

SDRAM column select output.

63

PCLK

O

O (p.d.)

Reset: output
Standby: 3-S

SDRAM clock output (Same as internal processing clock).

61

RAMDQM

O

O (p.d.)

Reset: output
Standby: 3-S (p.u.)

SDRAM data masking output.

54

RAMCS0#

O

O (p.u.)

Reset: output
Standby: 3-S (p.u.)

SDRAM chip select output for the lower 2MB device.

56

RAMCS1#

O

O (p.u.)

Reset: output
Standby: 3-S (p.u.)

SDRAM chip select output for the upper 2MB device.

59

RAMWE#

O

O (p.u.)

Reset: output
Standby: 3-S (p.u.)

SDRAM write enable output.

Test Signal Interface (3 pins)

Pin No.

Pin name

Type

Direction

Function

138

SCNENBL

I

I

Input

Production test pin (connected directly to GNDP in normal operation).

142

TESTMODE

I

I

Input

In normal operation this pin must be connected directly to GNDP. If it is connected to VDDP, then after RESET the
Decoder is in a test mode. This input may be changed only during RESET.