ISP1102 데이터 시트보기 (PDF) - NXP Semiconductors.
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ISP1102 Datasheet PDF : 26 Pages
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NXP Semiconductors
ISP1102
Advanced USB transceiver
7. Functional description
7.1 Function selection
Table 3. Function selection
SUSPEND OE
DP, DM
LOW
LOW
driving or
receiving
LOW
HIGH
receiving[1]
HIGH
LOW
driving
HIGH
HIGH
high-Z[1]
RCV
active
active
inactive[2]
inactive[2]
VP/VPO
VPO input
VP output
VPO input
VP output
VM/VMO
VMO input
VM output
VMO input
VM output
Function
normal driving (differential
receiver active)
receiving
driving during suspend
(differential receiver inactive)
low-power state
[1] Signal levels on the DP and DM pins are determined by other USB devices and external pull-up or pull-down resistors.
[2] In suspend mode (SUSPEND = HIGH), the differential receiver is inactive and output RCV is always LOW. The resume signaling is
detected through single-ended receivers VP/VPO and VM/VMO.
7.2 Operating functions
Table 4. Driving function using differential input data interface (pin OE = LOW)
VM/VMO
VP/VPO
Data
LOW
LOW
SE0
LOW
HIGH
differential logic 1
HIGH
LOW
differential logic 0
HIGH
HIGH
illegal state
Table 5. Receiving function (pin OE = HIGH)
DP, DM
RCV
Differential logic 0
LOW
Differential logic 1
HIGH
SE0
RCV*[1]
VP/VPO
LOW
HIGH
LOW
VM/VMO
HIGH
LOW
LOW
[1] RCV* denotes the signal level on output RCV just before the SE0 state occurs. This level is stable during
the SE0 period.
7.3 Power supply configurations
The ISP1102 can be used with various power supply configurations, which can be
changed dynamically. Table 7 provides an overview of power supply configurations.
Normal mode — VCC(I/O) is connected. VCC(5V0) is connected only, or VCC(5V0) and
VREG3V3 are connected.
For the 5 V operation, VCC(5V0) is connected to a 5 V source (4.0 V to 5.5 V). The internal
voltage regulator then produces 3.3 V for USB connections.
For the 3.3 V operation, both VCC(5V0) and VREG3V3 are connected to a 3.3 V source
(3.0 V to 3.6 V).
VCC(I/O) is independently connected to a voltage source (1.65 V to 3.6 V), depending on
the supply voltage of the external circuit.
ISP1102_5
Product data sheet
Rev. 05 — 11 December 2007
© NXP B.V. 2007. All rights reserved.
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