ISP1103 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
ISP1103 Datasheet PDF : 17 Pages
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Philips Semiconductors
ISP1103
USB transceiver
Table 2: Pin description…continued
Symbol
Pin Type Description
D−
D+
VPO/VO
10 AI/O negative USB data bus connection (analog, differential); for
low-speed mode connect to pin VCC(3.3) via a 1.5 kΩ resistor
11 AI/O positive USB data bus connection (analog, differential); for
full-speed mode connect to pin VCC(3.3) via a 1.5 kΩ resistor
12 I
differential driver data input (Schmitt trigger); see Table 4
VMO/FSE0 13 I
differential driver data input (Schmitt trigger); see Table 4
VCC(3.3)
14 -
supply voltage (3.0 to 3.6 V)
6. Functional description
6.1 Function selection
Table 3: Function table
SUSPND OE
D+/D−
L
L
driving
RCV
active
L
H
receiving [1] active
H
L
driving
inactive [2]
H
H
high-Z [1] inactive [2]
VP/VM
active
active
active
active
Function
normal driving
(differential receiver active)
receiving
driving during ‘suspend’
(differential receiver inactive)
low-power state
[1] Signal levels on D+/D− are determined by other USB devices and external pull-up/down resistors.
[2] In ‘suspend’ mode (SUSPND = H) the differential receiver is inactive and output RCV is always HIGH.
Out-of-suspend (‘K’) signalling is detected via the single-ended receivers VP and VM.
6.2 Operating functions
Table 4: Driving function (OE = L)
MODE
Interface type
L
Philips Encoded
Data Interface
H
USB-IF Standard
Data Interface
VPO/VO
L
L
H
H
L
L
H
H
VMO/FSE0
L
H
L
H
L
H
L
H
Data
differential logic 0
SE0
differential logic 1
SE0
SE0
differential logic 0
differential logic 1
illegal data
9397 750 06329
Preliminary specification
Table 5: Receiving function (OE = H)
D+/D−
RCV
VP
VM
differential logic 0
L
L
H
differential logic 1
H
H
L
SE0
RCV*
L
L
[1] RCV* denotes the signal level on output RCV just before SE0 state occurs. This level is kept stable
during the SE0 period.
Rev. 01 — 4 October 1999
© Philips Electronics N.V. 1999. All rights reserved.
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