Continued from preceding page.

Type: I: Input pin, O: Output pin, B: Bidirectional pin, P: Power supply pin, NC: No connection pin

Note: 1. NC pins must be left open. Do not connect any signal to these pins.

2. Pin names that start with Z are negative-logic signals.

4. Applications that use DRAM must insert resistors in the CAS and RAS lines, connect capacitors between these lines and ground, and take any

other measures necessary to prevent undershoot in the DRAM related circuits.

5. Since these circuits include buffers that sink 48 mA, adequate noise prevention measures must be applied.

No. 5240-5/8

LC895124

Pin No.

Symbol

Type

Function

51

TEST3

I

52

TEST4

I

53

ZRESET

I

LSI reset. The LSI is reset on a 0 input.

54

P

55

P

56

CSCTRL

I

Selects active-high or active-low for the microcontroller CS logic.

57

X1EN

I

Selection pin that must be set to 1 when XTALCK1 is used.

58

XTALCK1

I

SCSI block oscillator circuit input. Selected by X1EN.

59

XTAL1

O

SCSI block oscillator circuit output.

60

ZSWAIT

O

WAIT signal output to the microcontroller

61

P

62

P

63

D0

B

64

D1

B

65

D2

B

66

D3

B

67

D4

B

Microcontroller data signals

68

D5

B

69

D6

B

70

D7

B

71

ZRD

I

Microcontroller data read signal input

72

P

73

P

74

ZWR

I

Microcontroller data write signal input

75

ZCS

I

Input for the register chip select signal from the microcontroller

76

SUA0

I

77

SUA1

I

78

SUA2

I

79

SUA3

I

Register chip select signal from the microcontoller

80

SUA4

I

81

SUA5

I

82

SUA6

I

83

ZINT0

O

Interrupt request output to the microcontroller (ECC side. Set with a register.)

84

ZINT1

O

Interrupt request output to the microcontroller (SCSI side. Set with a register.)

85

NC

86

NC

87

NC

88

NC

89

NC

90

P

91

P

92

NC

93

NC

94

NC

95

DB0

B

SCSI connection

96

P

97

DB1

B

SCSI connection

98

DB2

B

99

P

100

DB3

B

SCSI connection

Continued on next page.