vsc055xkm-01 Maxim Integrated Products, Inc., vsc055xkm-01 Datasheet - Page 126
vsc055xkm-01
Manufacturer Part Number
vsc055xkm-01
Description
Enhanced I?c Backplane Controller
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.VSC055XKM-01.pdf
(133 pages)
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5.2
Table 25. Serial Interface
Table 26. Clock
Revision 4.1
January 2008
Pin Identifications
This section contains the functional descriptions for the VSC055-01device.
Pin Name
Pin Name
CKOUT
OSCO
ASEL
OSCI
SCL
SDA
A2
A1
A0
Pin Number
Pin Number
10
11
22
23
14
13
12
9
8
Bidirectional
Output
Output
Input
Input
Input
Type
Input
I/O
Pin Description
Oscillator Input
This pin is connected to one side of an external 8.0 MHz to 12.5 MHz
crystal to produce the clock required for the VSC055-01. 8.0 MHz,
8.33 MHz, 8.854 MHz and 10.0 MHz are pre-defined fixed frequencies
supported by the CKSEL pins when using a crystal. An alternate
external 3.3 V, 8.0MHz to 12.5MHz or 32.0MHz to 75.0MHz clock source
can be connected to this pin.
8.0MHz, 8.33MHz, 8.854MHz, 10.0MHz, 33.33MHz, 40.0MHz, 50.0MHz
and 53.125MHz are pre-defined fixed frequencies supported by the
CKSEL pins when using an external clock source.
Oscillator Output
This pin is connected to the other side of an external crystal. Leave
unconnected when using an external clock source.
Clock Output
This pin provides a low-speed clock output that can be used to drive
other VSC055-01 devices, as well as other peripheral devices. This
output can be disabled through register control if unused.
Pin Description
Address Select Bus
This pin group provides the value that is compared to bits 3:1 of the
serial slave address. These pins should be strapped to V
provide the appropriate binary value.
Device Type Address Select
This pin provides the ability to select between two-device type address
values in the serial slave address. When tied to V
address is 1000b, and when tied to V
1100b.
Two-wire Serial Interface Clock
This pin is used by the device to latch the data present on the SDA pin.
This pin, in conjunction with the SDA pin, also determines START and
STOP conditions on the serial bus.
Two-Wire Serial Interface Data
This pin is used to transfer all serial data into and out of the device. This
pin, in conjunction with the SCL pin, also determines START and STOP
conditions on the serial bus.
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