PI6C185-02 Просмотр технического описания (PDF) - Pericom Semiconductor
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PI6C185-02 Datasheet PDF : 6 Pages
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PI6C185-02
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2-Wire I2C Control
The I2C interface permits individual enable/disable of each clock
output and test mode enable.
The PI6C185-02 is a slave receiver device. It can not be read back.
Sub addressing is not supported. All preceding bytes must be sent
in order to change one of the control bytes.
Every bite put on the SDATA line must be 8-bits long (MSB first),
followed by an acknowledge bit generated by the receiving
device.
During normal data transfers SDATA changes only when SCLK is
LOW. Exceptions: A HIGH to LOW transition on SDATA while
SCLK is HIGH indicates a “start” condition. A LOW to HIGH
transition on SDATA while SCLK is HIGH is a “stop” condition
and indicates the end of a data transfer cycle.
1
Each data transfer is initiated with a start condition and ended with
a stop condition. The first byte after a start condition is always a
2 7-bit address byte followed by a read/write bit. (HIGH = read from
addressed device, LOW = write to addressed device). If the device’s
own address is detected, PI6C185-02 generates an acknowledge
by pulling SDATA line LOW during ninth clock pulse, then
3 accepts the following data bytes until another start or stop condition
is detected.
Following acknowledgement of the address byte (0D2H), two
more bytes must be sent:
1. “Command Code” byte, and
2. “Byte Count” byte.
4
Although the data bits on these two bytes are “don’t care,” they
must be sent and acknowledged.
5
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
6
Storage Temperature ..................................... –65°C to +150°C Stresses greater than those listed under MAXIMUM RATINGS
Ambient Temperature with Power Applied ....... –0°C to +70°C
3.3V Supply Voltage to Ground Potential ....... –0.5V to +4.6V
DC Input Voltage ............................................. –0.5V to +4.6V
may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other
7 conditions above those indicated in the operational sections of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
8
Supply Current (VDD = +3.465V, Cload = max)
Symbol
Parameter
Test Condition
Min. Typ. Max. Units
9
IDD
Supply Current BUF_IN = 0 MHz
IDD
Supply Current BUF_IN = 66.66 MHz
IDD
Supply Current BUF_IN = 100.0 MHz
3
mA
TBD
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PS8371 05/03/00
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