at89c5131 ATMEL Corporation, at89c5131 Datasheet - Page 99

• Manufacturer Part Number: at89c5131
• Description: 8-bit Flash Microcontroller With Full Speed Usb Device At89c5131
• Manufacturer: ATMEL Corporation

Two Wire Interface (
Introduction
98
AT89C5131
TWI
The Synchronous Serial Link Controller (SSLC) provides the selection of one synchro-
nous serial interface among the two most popular ones:
•
•
When an interface is selected, the other is no longer available, its usage is exclusive.
This section describes the TWI. In the rest of the section SSLC means TWI. The TWI
bus is a bi-directional two-wire serial communication standard. It is designed primarily
for simple but efficient integrated circuit (IC) control. The system is comprised of two
lines, SCL (Serial Clock) and SDA (Serial Data) that carry information between the ICs
connected to them. The serial data transfer is limited to 400 Kbit/s in standard mode.
Various communication configurations can be designed using this bus. Figure 46 shows
a typical TWI bus configuration. All the devices connected to the bus can be master and
slave.
Figure 46. TWI Bus Configuration
)
Two Wire Interface (TWI).
Serial Peripheral Interface (SPI)
SCL
SDA
device1
device2
device3
...
deviceN
4136C–USB–04/05