ISD5116X Winbond, ISD5116X Datasheet - Page 48

• Manufacturer Part Number: ISD5116X
• Description: Single-Chip Voice Record/Playback Device Up to 16-Minute Duration with Digital Storage Capability
• Manufacturer: Winbond

9 I
9.1 CHARACTERISTICS OF THE I
The I
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 may be initiated only when the interface bus is not busy.
9.1.1 Bit transfer
One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during
the HIGH period of the clock pulse, as changes in the data line at this time will be interpreted as a control
signal.
9.1.2 Start and stop conditions
Both data and clock lines remain HIGH when the interface 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).
October 2000
handbook, full pagewidth
2
2
C interface is for bi-directional, two-line communication between different ICs or modules. The two
C SERIAL INTERFACE TECHNICAL INFORMATION
SDA
SCL
SDA
SCL
START condition
S
Definition of START and STOP conditions
data valid
data line
stable;
Bit transfer on the I C-bus
2
C SERIAL INTERFACE
change
allowed
of data
2
STOP condition
P
MBC622
SDA
SCL
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