SM5902AF datasheet(37/40 Pages) NPC

37 / 40 page

NIPPON PRECISION CIRCUITS-37

SM5902AF

The SM5902AF operates from a 3 V supply volt-

age, but a built-in level shifter is provided for use

with external 5 V DRAM ICs. There are, therefore, 2

supply pins. VDD1 is the internal 3 V IC supply, and

VDD2 is the external DRAM interface supply.

If, however, the DRAM also operates from a 3 V

supply, VDD1 and VDD2 can be connected to the

same supply.

The SM5902AF incorporates a digital audio inter-

face output from pin DIT. Leave open circuit if not

used.

The SM5902AF supports additional function exten-

sions. Also, the UC6 pin has been removed, which

means that UC6-related commands have been

redefined.

Pin No.

SM5856A1F

SM5902AF

VDD

VDD2

NTEST1

DIT

NTEST2

NTEST

UC6

VDD1

NOE / NCAS2

A10 / NCAS2

Device comparison with SM5856A1F

Pin differences

VDD pins

DIT pin

Microcontroller interface extensions

Additional commands

Modified commands

Command

Bit

Name

Function

83H

Noise shaper ON/OFF switch

CMP12

12-bit comparison connection ON/OFF switch

86H

D4 to D7

CP1, 2, LBIT, DIT

Digital audio interface settings

87H

D0 to D11

QAD0 to 3, QD0 to 7

Subcode Q data settings

90H

BOVF

Input buffer overflow

91H

QRDY

Q data write buffer status

Command

Bit

Name

Function

85H

D6, D7

RAMS1, 2

External DRAM capacity

92H

S0 to 7, M1 to 8

AM06 to 21

Place of data residual

Obsolete commands

Command

Bit

Name

Function

81H

UC6OE

UC6 input/output settings

82H

UC6WD

UC6 output settings

93H

UC6RD

UC6 settings status

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