isp1504a1 NXP Semiconductors, isp1504a1 Datasheet - Page 18
isp1504a1
Manufacturer Part Number
isp1504a1
Description
Isp1504a1; Isp1504c1 Ulpi Hi-speed Universal Serial Bus On-the-go Transceiver
Manufacturer
NXP Semiconductors
Datasheet
1.ISP1504A1.pdf
(80 pages)
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NXP Semiconductors
ISP1504A1_ISP1504C1_1
Product data sheet
Fig 4. Entering and exiting 3-state in normal mode
CS_N/PWRDN
DATA[7:0]
CLOCK
NXT
STP
DIR
8.2 USB state transitions
A Hi-Speed USB host or an OTG device handles more than one electrical state as defined
in Universal Serial Bus Specification Rev. 2.0 and On-The-Go Supplement to the USB 2.0
Specification Rev. 1.2 . The ISP1504x1 accommodates various states through the register
bit settings of XCVRSELECT[1:0], TERMSELECT, OPMODE[1:0], DP_PULLDOWN and
DM_PULLDOWN.
Table 8
resistor settings as also given in
It is up to the link to set the desired register settings.
•
•
•
•
RPU_DP_EN enables the 1.5 k pull-up resistor on DP
RPD_DP_EN enables the 15 k pull-down resistor on DP
RPD_DM_EN enables the 15 k pull-down resistor on DM
HSTERM_EN enables the 45
entering power-down mode
summarizes operating states. The values of register settings in
t
PWRDN
Rev. 01 — 6 August 2007
exiting power-down mode
3-stated pins
Table
termination resistors on DP and DM
8. Resistor setting signals are defined as follows:
t
PWRUP
ISP1504A1; ISP1504C1
ULPI HS USB OTG transceiver
© NXP B.V. 2007. All rights reserved.
Table 8
will force
004aaa733
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