isp1705 NXP Semiconductors, isp1705 Datasheet - Page 58

• Manufacturer Part Number: isp1705
• Description: Ulpi Hi-speed Usb Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1705_1
Product data sheet
Table 35.
Bit
7
6
5
4
3
2
1
0
Symbol
USE_EXT_
VBUS_IND
DRV_VBUS_EXT
reserved
CHRG_VBUS
DISCHRG_VBUS
DM_PULLDOWN
DP_PULLDOWN
ID_PULLUP
OTG_CTRL - OTG control register (address R = 0Ah to 0Ch, W = 0Ah, S = 0Bh,
C = 0Ch) bit description
Rev. 01 — 13 June 2008
Description
Use external V
V
0b — Use the internal OTG comparator
1b — Use the external V
FAULT pin
Drive V
by the PSW_N pin.
0b — PSW_N is HIGH
1b — PSW_N to LOW
-
Charge V
pulsing of SRP. The link must first check that V
bit DISCHRG_VBUS), and that both the DP and DM data lines have
been LOW (SE0) for 2 ms.
0b — Do not charge V
1b — Charge V
Discharge V
this bit to logic 1, it waits for an RXCMD indicating that SESS_END
has changed from logic 0 to logic 1, and then resets this bit to logic 0
to stop the discharge.
0b — Do not discharge V
1b — Discharge V
DM pull down: Enables the 15 k pull-down resistor on DM.
0b — pull-down resistor is not connected to DM
1b — pull-down resistor is connected to DM
DP pull down: Enables the 15 k pull-down resistor on DP.
0b — Pull-down resistor is not connected to DP
1b — Pull-down resistor is connected to DP
ID pull up: Connects a pull-up to the ID line and enables sampling of
the ID level. Disabling the ID line sampler will reduce the PHY power
consumption.
0b — Disable sampling of the ID line
1b — Enable sampling of the ID line
BUS
overcurrent indicator.
BUS
BUS
external: Controls the external charge pump or 5 V supply
BUS
: Charges V
BUS
BUS
: Discharges V
BUS
indicator: Informs the PHY to use an external
BUS
BUS
BUS
BUS
valid indicator signal input from the
through a resistor. Used for the V
BUS
ULPI Hi-Speed USB transceiver
through a resistor. If the link sets
BUS
© NXP B.V. 2008. All rights reserved.
is discharged (see
ISP1705
BUS
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