SLG47503 datasheet(115/191 Pages) DIALOG

115 / 191 page

Datasheet

16-Jul-2021

CFR0011-120-00

Revision 2.0

115 of 191

SLG47502/03

Low Voltage GreenPAK Programmable

Mixed-Signal Matrix

Preliminary

15.4.4 Random Read Command

The Random Read command starts with a Control Byte (with R/W bit set to “0”, indicating a write command) and Word Address

to set the internal byte address, followed by a Start bit, and then the Control Byte for the read (exactly the same as the Byte Write

command). The Start bit in the middle of the command will halt the decoding of a Write command, but will set the internal address

counter in preparation for the second half of the command. After the Start bit, the Bus Master issues a second control byte with

the R/W bit set to “1”, after which the SLG47502/03 issues an Acknowledge bit, followed by the requested eight data bits.

15.4.5 Sequential Read Command

The Sequential Read command is initiated in the same way as a Random Read command, except that once the SLG47502/03

transmits the first data byte, the Bus Master issues an Acknowledge bit as opposed to a Stop condition in a random read. The

Bus Master can continue reading sequential bytes of data, and will terminate the command with a Stop condition.

Figure 102: Current Address Read Command, R/W = 1

Figure 103: Random Read Command

Figure 104: Sequential Read Command

Not used, set to 0

Control Byte

Data (n)

Control

Code

Block

Address

R/W bit = 1

ACK

Acknowledge

bit

Start

bit

Stop

bit

No ACK

bit

SDA LINE

Bus Activity

Control

Code

Not used, set to 0

X X X X

Control Byte

Word Address (n)

Control

Code

Block

Address

Write bit

ACK

Acknowledge

bit

Start

bit

Control Byte

Stop

bit

SDA LINE

Bus Activity

ACK

Data (n)

ACK

X X X X

Read bit

No ACK

bit

Block

Address

X X X X

Control Byte

Data (n)

Control

Code

Block

Address

Read bit

ACK

Acknowledge

bit

Start

bit

Data (n + 1)

Stop

bit

SDA LINE

Bus Activity

ACK

Data (n + 2)

ACK

Data (n + x)

No ACK

bit

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