Datasheet

AT30TSE004A [DATASHEET]
Atmel-8868C-DTS-AT30TSE004A-Datasheet_122013
10
4.7 Timeout
The AT30TSE004A supports the industry standard bus Timeout feature on both temperature sensor and Serial
EEPROM operations to help prevent potential system bus hang-ups. The device resets its serial interface and
will stop driving the bus (will let SDA float high) if the SCL pin is held low for more than the minimum Timeout
(t
OUT
) specification. The AT30TSE004A will be ready to accept a new Start condition before the maximum t
OUT
has elapsed (see Figure 4-3). This feature does require a minimum SCL clock speed of 10kHz to avoid any
timeout issues.
Figure 4-3. Timeout
4.8 2-wire Software Reset
After an interruption in protocol, power loss, or system reset, any 2-wire part can be reset by following these
steps:
1. Create a Start condition.
2. Clock nine cycles.
3. Create another Start condition followed by Stop condition as shown in Figure 4-4.
Figure 4-4. 2-wire Software Reset
Device will release Bus and
be ready to accept a new
Start Condition within this Time
t
TIMEOUT (MAX)
t
TIMEOUT (MIN)
SCL
SCL
SDA
9
8321
Start
Condition
Start
Condition
Stop
Condition
Dummy Clock Cycles