isp1504c NXP Semiconductors, isp1504c Datasheet - Page 25

• Manufacturer Part Number: isp1504c
• Description: Ulpi Hi-speed Universal Serial Bus On-the-go Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1504A_ISP1504C_1
Product data sheet
Fig 9. Entering and exiting 3-state in suspend mode
SUSPENDM
SELECT_N
Remark: Clock timing is not to scale.
DATA[7:0]
CLOCK
(output)
CHIP_
NXT
STP
DIR
9.4.1 Driving 5 V on V
9.4.2 Fault detection
9.4 V
The ISP1504 provides a built-in charge pump. To enable the charge pump, the link must
set the DRV_VBUS bit in the OTG Control register.
The ISP1504 also supports external 5 V supplies. The ISP1504 can control the external
supply using the active-LOW PSW_N open-drain output pin. To enable the external supply
by driving PSW_N to LOW, the link must set the DRV_VBUS_EXT bit in the OTG Control
register to logic 1. The link can optionally set both the DRV_VBUS and DRV_VBUS_EXT
bits to logic 1 to enable the external supply.
Table 9
Table 9.
The ISP1504 supports external V
indicator signal. The indicator signal must be connected to the FAULT pin. To enable the
ISP1504 to monitor the digital fault input, the link must set the USE_EXT_VBUS_IND bit
in the OTG Control register. By default, the digital indicator is interpreted by the ISP1504
DRV_VBUS DRV_VBUS_EXT
0
1
X
BUS
TXCMD
power and fault detection
summarizes settings to drive 5 V on V
suspend mode
OTG Control register power control bits
entering
0
0
1
DATA
3-state mode
entering
BUS
Rev. 01 — 19 October 2006
3-stated pins
input ignored
Power source used
internal and external V
internal V
external 5 V V
BUS
fault detector circuits that output a digital fault
BUS
charge pump is enabled
BUS
ISP1504A; ISP1504C
BUS
3-state mode
supply is enabled
exiting
.
BUS
power sources are disabled
ULPI HS USB OTG transceiver
suspend mode
exiting
© NXP B.V. 2006. All rights reserved.
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