GS3471 datasheet(8/179 Pages) SEMTECH

8 / 179 page

GS3471

Final Data Sheet Rev.4

PDS-060498

September 2017

8 of 179

Semtech

www.semtech.com

A5, A6

XTAL, XTAL

Analog Input

Input connection for 27MHz crystal. When a reference clock input is

used on XTAL, do not connect XTAL.

PCLK

Output

Parallel data bus clock.

Please refer to the Output Logic parameters in Table 2-3: DC

Electrical Characteristics for logic level threshold and compatibility.

Please refer to Table 4-6: GS3471 Output Data Formats for PCLK

output rates.

B1, B2

DDI_VDD

Power

Power pins for DDI/DDI. Connect to 1.2V DC analog.

A7, B3, B4

RSVD

—

These pins are reserved, do not connect.

B7, D10, G10, K7

IO_VDD

Power

Power connection for digital I/O. Connect to 1.8V or 2.5V DC digital.

B8, A9, A10, B9,

B10, C9, C10, C8,

E10, E9, F10, F9,

H10, H9, J10, J9,

K10, K9, J8, K8

DOUT[19:0]

Output

Parallel data bus.

Please refer to the Output Logic parameters in Table 2-3: DC

Electrical Characteristics for logic level threshold and compatibility.

20-bit mode



20BIT_10BIT = HIGH

SMPTE mode

(SMPTE_BYPASS = HIGH and

DVB_ASI = LOW):

DOUT[19:10] — Luma data output for

SD and HD data rates; Data Stream 1 for

3G data rate

DOUT[9:0] — Chroma data output for

SD and HD data rates; Data Stream 2 for

3G data rate

Data-Through mode

(SMPTE_BYPASS = LOW and

DVB_ASI = LOW):

Data output

10-bit mode

20BIT_10BIT = LOW

(DOUT[19:10])

SMPTE mode

(SMPTE_BYPASS = HIGH and

DVB_ASI = LOW):

Multiplexed Luma/Chroma data output

for SD and HD data rates; Multiplexed

Data Stream 1&2 for 3G data rate

DVB-ASI mode

(SMPTE_BYPASS = LOW and

DVB_ASI = HIGH):

8/10bit decoded DVB-ASI data for SD

data rates

Data-Through mode

(SMPTE_BYPASS = LOW and

DVB_ASI = LOW):

Data output

Note 1: When in 10-bit mode,

DOUT[9:0] are set to 0.

Note 2: When in 10-bit mode, leave

unused output pins unconnected.

C1, C2, D2

PLL_VDD

Power

Power pins for the Retimer PLL. Connect to 1.2V DC analog.

Table 1-1: Pin Descriptions (Continued)

Pin Number

Name

Type

Description

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