isp1302 NXP Semiconductors, isp1302 Datasheet - Page 18

• Manufacturer Part Number: isp1302
• Description: Isp1302 Universal Serial Bus On-the-go Transceiver With Carkit Support
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Modes of operation
ISP1302_1
Product data sheet
8.1.1 Normal mode
8.1.2 Disable mode
8.1.3 Isolate mode
8.1 Power modes
The ISP1302 supports three types of modes:
In this mode, both V
operation range.
There are three levels of power saving schemes in the ISP1302:
In disable mode, V
power-down state.
The USB differential driver will be 3-stated as long as V
In isolate mode, V
a stable level to all digital output pins, and all bidirectional digital pins will be set in 3-state.
Table 10
Table 10.
Table 11
V
Off
Off
On
On
On
•
•
•
•
•
•
CC
Power modes
USB modes
Transparent modes
Active-power mode: power is on; all circuits are active.
USB suspend mode: to reduce power consumption, the USB differential receiver is
powered down.
Power-down mode: set by writing logic 1 to bit PWR_DN of the Mode Control 2
register. The clock generator and all biasing circuits are turned off to reduce power
consumption to the minimum possible. For details on waking up the clock, see
Section
shows a summary of power modes.
shows the pin states in disable and isolate modes.
ISP1302 power modes summary
V
off
on
off
on
on
10.
CC(I/O)
CC
CC(I/O)
CC
is cut-off and V
PWR_DN (bit)
X
X
X
0
1
and V
Rev. 01 — 24 May 2007
is cut-off and V
CC(I/O)
are connected and their voltage levels are within the
CC(I/O)
CC
is powered. In this mode, the ISP1302 will drive
is powered. In this mode, the ISP1302 is in the
I
yes
yes
yes
no
yes
CC
USB OTG transceiver with carkit support
= I
CC(pd)
CC(I/O)
Comment
power off
isolate mode
disable mode (power-down)
normal mode (full operation)
normal mode (power-down)
is not present.
© NXP B.V. 2007. All rights reserved.
ISP1302
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