CXD1916R 데이터 시트보기 (PDF) - Sony Semiconductor

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CXD1916R

Digital Video Encoder

Sony Semiconductor 

CXD1916R

2-2. Sony serial interface

The Sony serial interface uses the SCK, XCS, SI and SO signals.

The serial interface is active when the XCS signal is Low and transmits and receives signals to and from the

host.

The first byte after the XCS signal becomes Low is set up as a serial control command. Its data includes a

control register address and read/write mode information for the interface. (See 2-2-1. Serial control command

format.)

The control register address is automatically incremented with the transfer completion of each byte of data. In

write mode, the SI signal of the serial input data is sampled at the rising edge of the SCK signal. In read mode,

the register value is read out as the SO signal of the serial output data at the falling edge of the SCK signal,

and is variable. In this case, the SI signal of the serial input data is ignored.

Serial Interface Timing

SCK

XCS

SI

SO

D0 D1 D2 D3 D4 D5 D6 D7

LSB Serial Control Command

MSB

Serial Interface Sequence

SCK

XCS

SI

00H

FFH

Internal address

00H

D0 D1 D2 D3 D4 D5 D6 D7

LSB

Serial Data

MSB

D0 D1 D2 D3 D4 D5 D6 D7

11H

CEH

01H

02H

Control register

address set

Control register address

auto-increment

Control Register Address

00H

01H

02H

Control Register Data

FFH

11H

CEH

Control register address

auto-increment

2-2-1. Serial control command format

D7

D6

D5

D4

D3

D2

D1

D0

WR

ADR[4:0]

WR:

Read/write mode

When this bit is "1":

The serial interface is write mode, and the SI signal of the serial input data is written in the

register.

When this bit is "0":

The serial interface is read mode, and the register value is read out as the SO signal of the

serial output data.

ADR[4:0]: Control register address setting (Initial value of the address)

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