SM5951A

SEIKO NPC CORPORATION —5

PIN DESCRIPTION

Number of

Pins

Name

I/O

1. Attributes: S

= Schmitt type, PU = with pull-up resistor, PD = with pull-down resistor, mA = output current

Voltage

Functional Description

1

RST_X

I

PU, S

3.3V

System Reset

1FS

I

−

3.3V

1fs Clock (44.1kHz)

1

CLK

I

−

3.3V

Master Clock

1

SEL1280

I

PD, S

3.3V

Select Master Clock Rate

[HIGH]: 1280

× 44.1kHz, [LOW]: 1024 × 44.1kHz

1

SELDSDI

I

PD, S

3.3V

Select DSD Input Format

[HIGH]: Manchester Encoding, [LOW]: Normal

1

SELDSDO

I

PD, S

3.3V

Select DSD Output Format

[HIGH]: Manchester Encoding, [LOW]: Normal

2

SELBUS [1:0]

I

PU, S

3.3V

Select MCU Data Bus Width

[SELBUS1, SELBUS0]

[LOW, LOW]: 8-bit

[LOW, HIGH]: 16-bit

[HIGH,

× (LOW or HIGH)]: 32-bit

1

CS_X

I

PU

3.3V

MCU I/F: Chip Select

1

WR_X

I

PU, S

3.3V

MCU I/F: Write Enable

1

RD_X

I

PU, S

3.3V

MCU I/F: Read Enable

8

ADDR [7:0]

I

PU

3.3V

MCU I/F: Address Bus

32

DATA [31:0]

I/O

3mA

3.3V

MCU I/F: Data Bus

1

BCKI

I

S

3.3V

DSD Input: Bit Clock IN

4

DSDI1_[3:0]

I

−

3.3V

DSD Input: DSD CH1 Data (LINE0 to LINE3)

4

DSDI2_[3:0]

I

−

3.3V

DSD Input: DSD CH2 Data (LINE0 to LINE3)

4

DSDI3_[3:0]

I

−

3.3V

DSD Input: DSD CH3 Data (LINE0 to LINE3)

4

DSDI4_[3:0]

I

−

3.3V

DSD Input: DSD CH4 Data (LINE0 to LINE3)

4

DSDI5_[3:0]

I

−

3.3V

DSD Input: DSD CH5 Data (LINE0 to LINE3)

4

DSDI6_[3:0]

I

−

3.3V

DSD Input: DSD CH6 Data (LINE0 to LINE3)

4

DSDI7_[3:0]

I

−

3.3V

DSD Input: DSD CH7 Data (LINE0 to LINE3)

4

DSDI8_[3:0]

I

−

3.3V

DSD Input: DSD CH8 Data (LINE0 to LINE3)

1

EXMUTE

I

−

3.3V

DSD Input: External Mute Pattern

1

BCKO

O

6mA

3.3V

DSD Output: Bit Clock Out

8

DSDO [8:1]

O

3mA

3.3V

DSD Output: DSD Output DATA (CH1 to CH8)

1

BCK64O

O

6mA

3.3V

DSD 64fs Output: Bit Clock Out

8

DSD64O [8:1]

O

3mA

3.3V

DSD 64fs Output: DSD Output DATA (CH1 to CH8)

1

MOSYNC

O

3mA

3.3V

SYNC Monitor

8

TEST [8:1]

I

PD

3.3V

IOTEST_EN, SCAN_EN, ATPG_EN, FUNC_MODE etc.

10

VDDH

−−

3.3V

Power Supply (I/O)

14

VDDL

−−

2.5V

Power Supply (Core)

24

VSS

−−

0V

Ground Level