isp1302 NXP Semiconductors, isp1302 Datasheet - Page 16

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

NXP Semiconductors
Table 8.
ISP1302_1
Product data sheet
USB mode
DAT_SE0
DAT_SE0
DAT_SE0
VP_VM
VP_VM
VP_VM
VP_VM
VP_VM
VP_VM
VP_VM
VP_VM
USB functional mode: receive operation
7.12 Power-On Reset (POR)
7.13 I
Bit SUSPEND
1
1
1
0
0
0
0
1
1
1
1
When V
(t
The power-on reset function can be explained by viewing the dips at t2 to t3 and t4 to t5
on the V
t0 — The internal POR starts with a LOW level.
t1 — The detector will see the passing of the trip level and a delay element will add
another t
t2 to t3 — The internal POR pulse will be generated whenever V
for more than 11 s.
t4 to t5 — The dip is too short (< 11 s) and the internal POR pulse will not react and will
remain LOW.
The ADR/PSW pin has two functions. Both functions are described as follows.
2
Fig 9. Internal power-on reset timing
PORP
C-bus device address and external charge pump control
(1) PORP = Power-On Reset Pulse.
) will typically be 200 ns. The pulse is started when V
CC
CC
PORP
Inputs
DP
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
t0
is powered on, an internal POR is generated. The internal POR pulse width
curve (see
before it drops to LOW.
t1
t
PORP
Figure
Rev. 01 — 24 May 2007
DM
LOW
HIGH
HIGH
LOW
LOW
HIGH
HIGH
LOW
LOW
HIGH
HIGH
…continued
9).
t2
Outputs
DAT/VP
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
USB OTG transceiver with carkit support
t3
t
PORP
SE0/VM
LOW
LOW
LOW
LOW
LOW
HIGH
HIGH
LOW
LOW
HIGH
HIGH
t4
CC
t5
rises above V
004aaa582
CC
drops below V
© NXP B.V. 2007. All rights reserved.
RCV
X
X
X
last value of RCV
HIGH
LOW
last value of RCV
X
X
X
X
PORP
V
ISP1302
V
CC
POR(trip)
POR(trip)
(1)
POR(trip)
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