tcn75a Microchip Technology Inc., tcn75a Datasheet - Page 9

• Manufacturer Part Number: tcn75a
• Description: 2-wire Serial Temperature Sensor
• Manufacturer: Microchip Technology Inc.

FIGURE 4-1:
4.1.5
After the Start condition, each bit of data in
transmission needs to be settled for a time specified by
t
“Sensor And EEPROM Serial Interface Timing
Specifications” on Page 4).
© 2006 Microchip Technology Inc.
SU-DATA
SDA
SCL
Start
before SCL toggles from low-to-high (see
DATA VALID
1
1
Address
Code
2
0
3
0
Device Addressing.
Address Byte
4
1 A2 A1 A0
5
Address
Slave
6
TCN75A Response
7
R/W
8
9
A
C
K
4.1.6
Each receiving device, when addressed, is obliged to
generate an ACK bit after the reception of each byte.
The master device must generate an extra clock pulse
for ACK to be recognized.
The acknowledging device pulls down the SDA line for
t
the master. SDA also needs to remain pulled down for
t
During read, the master must signal an End-of-Data
(EOD) to the slave by not generating an ACK bit (NAK)
once the last bit has been clocked out of the slave. In
this case, the slave will leave the data line released to
enable the master to generate the Stop condition.
SU-DATA
H-DATA
after a high-to-low transition of SCL.
before the low-to-high transition of SCL from
ACKNOWLEDGE (ACK)
TCN75A
DS21935C-page 9