參數(shù)資料
型號(hào): ISP1103
廠商: NXP Semiconductors N.V.
英文描述: Universal Serial Bus transceiver
中文描述: 通用串行總線收發(fā)器
文件頁(yè)數(shù): 4/17頁(yè)
文件大?。?/td> 484K
代理商: ISP1103
Philips Semiconductors
ISP1103
USB transceiver
Preliminary specification
Rev. 01 — 4 October 1999
4 of 17
9397 750 06329
Philips Electronics N.V. 1999. All rights reserved.
6.
Functional description
6.1 Function selection
[1]
[2]
Signal levels on D
+
/D
are determined by other USB devices and external pull-up/down resistors.
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
[1]
RCV* denotes the signal level on output RCV just before SE0 state occurs. This level is kept stable
during the SE0 period.
D
10
AI/O
negative USB data bus connection (analog, differential); for
low-speed mode connect to pin V
CC(3.3)
via a 1.5 k
resistor
positive USB data bus connection (analog, differential); for
full-speed mode connect to pin V
CC(3.3)
via a 1.5 k
resistor
differential driver data input (Schmitt trigger); see
Table 4
differential driver data input (Schmitt trigger); see
Table 4
supply voltage (3.0 to 3.6 V)
D
+
11
AI/O
VPO/VO
VMO/FSE0
V
CC(3.3)
12
13
14
I
I
-
Table 2:
Symbol
Pin description
…continued
Pin
Type
Description
Table 3:
SUSPND
L
Function table
OE
L
D
+
/D
driving
RCV
active
VP/VM
active
Function
normal driving
(differential receiver active)
receiving
driving during ‘suspend’
(differential receiver inactive)
low-power state
L
H
H
L
receiving
[1]
driving
active
inactive
[2]
active
active
H
H
high-Z
[1]
inactive
[2]
active
Table 4:
MODE
Driving function (OE = L)
Interface type
VPO/VO
L
L
H
H
L
L
H
H
VMO/FSE0
L
H
L
H
L
H
L
H
Data
L
Philips Encoded
Data Interface
differential logic 0
SE0
differential logic 1
SE0
SE0
differential logic 0
differential logic 1
illegal data
H
USB-IF Standard
Data Interface
Table 5:
Receiving function (OE = H)
D
+
/D
differential logic 0
differential logic 1
SE0
RCV
L
H
RCV*
VP
L
H
L
VM
H
L
L
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