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DS40001663B-page 13

MTCH6301

6.3

Generic Read/Write Protocol

6.3.1

MASTER READ WAVEFORM

FIGURE 6-1:

MASTER READ WAVEFORM

6.3.2

MASTER WRITE WAVEFORM

FIGURE 6-2:

MASTER WRITE WAVEFORM

Note 1: The first byte read from the device denotes the number of bytes to follow.

2: The last byte read from the device must be followed by a nACK (‘1’) from the host controller. All other bytes

should be followed with ACK (‘0’).

are not supported.

ACK

P

S

ACK

NACK

ACK

R

Stop

D7 D6 D5 D4 D3 D2 D1 D0

D7 D6 D5 D4 D3 D2 D1 D0

D7 D6 D5 D4 D3 D2 D1 D0

0x25

1

[NUM_BYTES]

[DATA0]

Start

INT

SCL

SDA

(DATA)

2

1

3

4

Note 1: If the device is sleeping, it will ACK the address byte, but will not ACK the first byte of the transmission

until it is awake. See Section 9. “Send Enable Touch command (0x00).” for details.

2: The first byte written to the controller denotes the number of bytes to follow.

the chance of a timeout occurring.

ACK

P

S

ACK

ACK

W

Stop

D7 D6 D5 D4 D3 D2 D1 D0

D7 D6 D5 D4 D3 D2 D1 D0

D7 D6 D5 D4 D3 D2 D1 D0

0x25

0

[NUM_BYTES]

[DATA0]

Start

INT

SCL

SDA

(DATA)

1

2

3

ACK