isd5216 Winbond Electronics Corp America, isd5216 Datasheet - Page 15

• Manufacturer Part Number: isd5216
• Description: 8 To 16 Minutes Voice Record/playback Device With Integrated Codec
• Manufacturer: Winbond Electronics Corp America

The I
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 may be initiated only when the interface bus is not
busy.
A device generating a message is a ‘transmitter’; a device receiving a message is the ‘receiver’. The
device that controls the message is the ‘master’ and the devices that are controlled by the master are
the ‘slaves’.
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)
7.3. I
2
C interface is for bi-directional, two-line communication between different ICs or modules. The
7.3.1. System configuration
7.3.2. Start and stop conditions
2
C INTERFACE
SDA
SCL
SDA
SCL
START condition
Example of an I
MICRO-
CONTROLLER
S
Definition of START and STOP conditions
GATE
ARRAY
2
C-bus configuration using two microcontrollers
LSD
DRIVER
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ISD 5116
STATIC
RAM OR
EEPROM
Publication Release Date: Jan. 31, 2006
STOP condition
P
ISD5216
SDA
SCL
Revision B.4