s-24c02bpphl Seiko Instruments Inc., s-24c02bpphl Datasheet - Page 22

• Manufacturer Part Number: s-24c02bpphl
• Description: 2-wire Cmos Serial E2prom
• Manufacturer: Seiko Instruments Inc.

22
6. Acknowledge check
7. Built-in power-on-clear circuit
7.1 Raising power supply voltage
2-WIRE CMOS SERIAL E
S-24C02BPPHL
The I
communication error. This function allows detection of a communication failure during data communication
between the microprocessor and E
recommended to perform an acknowledge check on the microprocessor side.
E
cause a malfunction. For the power-on-clear circuit to operate normally, the following conditions must be
satisfied for raising the power supply voltage.
Raise the power supply voltage, starting at 0.2 V maximum, so that the voltage reaches the power supply
voltage to be used within the time defined by t
For example, when the power supply voltage to be used is 5.0 V, t
The power supply voltage must be raised within 200 ms.
2
PROMs have a built-in power-on-clear circuit that initializes the E
2
C-BUS protocol includes an acknowledge check function as a handshake function to prevent a
V
*1. 0 V means there is no difference in potential between the V
*2. t
INIT
GND pin of the E
accepted during this time.
(Max.)
INIT
is the time required to initialize the E
2
PROM
0.2 V
Figure 23 Raising Power Supply Voltage
2
PROM.
2
PROM.
Seiko Instruments Inc.
RISE
This function is effective to prevent malfunction, so it is
t
t
RISE
INIT
as shown in Figure 23 .
*2
(Max.)
(Max.)
2
PROM. No instructions are
RISE
2
PROM. Unsuccessful initialization may
is 200 ms as shown in Figure 24 .
Power supply voltage (V
0 V
*1
CC
pin and the
Rev.2.2
CC
)
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