isp1504a1 NXP Semiconductors, isp1504a1 Datasheet - Page 51

• Manufacturer Part Number: isp1504a1
• Description: Isp1504a1; Isp1504c1 Ulpi Hi-speed Universal Serial Bus On-the-go Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 30.
Table 31.
ISP1504A1_ISP1504C1_1
Product data sheet
Bit
7
6
5
4
3
2
1
0
Bit
Symbol
Reset
Access
Symbol
USE_EXT_VBUS
_IND
DRV_VBUS_EXT
-
CHRG_VBUS
DISCHRG_VBUS Discharge V
DM_PULLDOWN
DP_PULLDOWN
ID_PULLUP
OTG Control register (address R = 0Ah to 0Ch, W = 0Ah, S = 0Bh, C = 0Ch) bit description
USB Interrupt Enable Rising Edge register (address R = 0Dh to 0Fh, W = 0Dh, S = 0Eh, C = 0Fh) bit
allocation
10.1.5 USB Interrupt Enable Rising Edge register
R/W/S/C
7
0
The bits in this register enable interrupts and RXCMDs to be sent when the corresponding
bits in the USB Interrupt Status register change from logic 0 to logic 1. By default, all
transitions are enabled.
Description
Use External V
0b — Use the internal OTG comparator.
1b — Use the external V
Drive V
0b — PSW_N is HIGH.
1b — PSW_N to LOW.
reserved
Charge V
first check that V
data lines have been LOW (SE0) for 2 ms.
0b — Do not charge V
1b — Charge V
an RXCMD indicating that SESS_END has changed from 0 to 1, and then resets this bit to 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 PHY power consumption.
0b — Disable sampling of the ID line.
1b — Enable sampling of the ID line.
reserved
R/W/S/C
6
0
BUS
BUS
External: Controls external charge pump or 5 V supply by the PSW_N pin.
BUS
: Charges V
R/W/S/C
BUS
BUS
: Discharges V
BUS
BUS
.
5
0
Indicator: Informs the PHY to use an external V
is discharged (see bit DISCHRG_VBUS), and that both the DP and DM
.
Rev. 01 — 6 August 2007
BUS
Table 31
BUS
BUS
BUS
.
ID_GND_R
valid indicator signal input from the FAULT pin.
.
through a resistor. Used for the V
R/W/S/C
BUS
4
1
shows the bit allocation of the register.
through a resistor. If the link sets this bit to logic 1, it waits for
ISP1504A1; ISP1504C1
R/W/S/C
END_R
SESS_
3
1
VALID_R
R/W/S/C
SESS_
ULPI HS USB OTG transceiver
2
1
BUS
pulsing of SRP. The link must
BUS
VALID_R
R/W/S/C
VBUS_
overcurrent indicator.
1
1
© NXP B.V. 2007. All rights reserved.
DISCON_R
R/W/S/C
HOST_
0
1
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