pca9547bs NXP Semiconductors, pca9547bs Datasheet - Page 7

• Manufacturer Part Number: pca9547bs
• Description: Pca9547 8-channel I2c-bus Multiplexer With Reset
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PCA9547_2
Product data sheet
6.3 RESET input
6.4 Power-on reset
Table 4.
Write = channel selection; Read = channel status
The RESET input is an active LOW signal which may be used to recover from a bus fault
condition. By asserting this signal LOW for a minimum of t
register and I
RESET input must be connected to V
When power is applied to V
a reset condition until V
and the PCA9547 register and I
causing all the channels to be deselected except channel 0. Thereafter, V
lowered below 0.2 V to reset the device.
D7
X
X
X
X
X
X
X
X
X
0
D6
X
X
X
X
X
X
X
X
X
0
Control register
2
C-bus state machine and will deselect all channels except channel 0. The
D5
X
X
X
X
X
X
X
X
X
0
Rev. 02 — 12 September 2006
DD
D4
X
X
X
X
X
X
X
X
X
0
has reached V
DD
, an internal Power-On Reset (POR) holds the PCA9547 in
2
C-bus state machine are initialized to their default states,
B3
0
1
1
1
1
1
1
1
1
1
DD
through a pull-up resistor.
B2
POR
X
0
0
0
0
1
1
1
1
0
. At this point, the reset condition is released
8-channel I
B1
X
0
0
1
1
0
0
1
1
0
B0
X
0
1
0
1
0
1
0
1
0
w(rst)L
2
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
C-bus multiplexer with reset
Command
no channel selected
channel 0 enabled
channel 1 enabled
channel 2 enabled
channel 3 enabled
channel 4 enabled
channel 5 enabled
channel 6 enabled
channel 7 enabled
channel 0 enabled;
power-up/reset default state
, the PCA9547 will reset its
PCA9547
DD
must be
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