PCF8593T NXP Semiconductors, PCF8593T Datasheet - Page 14

• Manufacturer Part Number: PCF8593T
• Manufacturer: NXP Semiconductors

Specifications of PCF8593T

• Bus Type: Serial (I2C)
• User Ram: 8Byte
• Package Type: SO
• Operating Supply Voltage (max): 6V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
8. Characteristics of the I
PCF8593
Product data sheet
8.1.1 Bit transfer
8.1.2 Start and stop conditions
8.1.3 System configuration
8.1 Characteristics
The I
The two lines are a Serial DAta line (SDA) and a Serial Clock Line (SCL). Both lines must
be connected to a positive supply via a pull-up resistor. Data transfer is initiated only when
the bus is not busy.
One data bit is transferred during each clock pulse (see
line must remain stable during the HIGH period of the clock pulse as changes in the data
line at this time are interpreted as a control signal.
Both data and clock lines remain HIGH when the bus is not busy.
A HIGH-to-LOW transition of the data line while the clock is HIGH is defined as the START
condition - S.
A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP
condition - P (see
A device generating a message is a transmitter; a device receiving a message is the
receiver (see
devices which are controlled by the master are the slaves.
Fig 14. Bit transfer
Fig 15. Definition of start and stop conditions
2
C-bus is for bidirectional, two-line communication between different ICs or modules.
SDA
SCL
Figure
START condition
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2
SDA
SCL
Figure
C-bus
S
16). The device that controls the message is the master; and the
Rev. 04 — 6 October 2010
15).
data valid
data line
stable;
allowed
change
of data
Figure
Low power clock and calendar
STOP condition
14). The data on the SDA
mbc621
P
PCF8593
© NXP B.V. 2010. All rights reserved.
mbc622
SDA
SCL
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