isp1504a NXP Semiconductors, isp1504a Datasheet - Page 19

• Manufacturer Part Number: isp1504a
• Description: Ulpi Hi-speed Universal Serial Bus On-the-go Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 7.
Table 8.
ISP1504A_ISP1504C_3
Product data sheet
Signal
TX_ENABLE
DAT
SE0
INT
Reserved
Signaling mode
General settings
3-state drivers
Power-up or
V
Host settings
Host chirp
Host high-speed
Host full-speed
Host high-speed or
full-speed suspend
Host high-speed or
full-speed resume
Host low-speed
BUS
< V
B_SESS_END
Signal mapping for 3-pin serial mode
Operating states and their corresponding resistor settings
8.2 USB and OTG state transitions
Maps to
DATA0
DATA1
DATA2
DATA3
DATA[7:4]
Register settings
XCVR
SELECT
[1:0]
XXb
01b
00b
00b
X1b
01b
01b
10b
A Hi-Speed USB peripheral, host or 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. 1.3 . The ISP1504 accommodates various states through
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
summarizes operating states. The values of register settings in
TERM
SELECT
Xb
0b
0b
0b
1b
1b
1b
1b
Direction
I
I/O
I/O
O
O
OPMODE
[1:0]
01b
00b
10b
00b
00b
00b
10b
00b
Description
active HIGH transmit enable
transmit differential data on DP and DM when TX_ENABLE is HIGH
receive differential data from DP and DM when TX_ENABLE is LOW
transmit single-ended zero on DP and DM when TX_ENABLE is HIGH
receive single-ended zero from DP and DM when TX_ENABLE is LOW
active HIGH interrupt indication; will be asserted whenever any
unmasked interrupt occurs
reserved; the ISP1504 will drive these pins to LOW
Rev. 03 — 7 April 2008
DP_PULL
DOWN
Xb
1b
1b
1b
1b
1b
1b
1b
Table
termination resistors on DP and DM
8. Resistor setting signals are defined as follows:
DM_PULL
DOWN
Xb
1b
1b
1b
1b
1b
1b
1b
ISP1504A; ISP1504C
Internal resistor settings
RPU_
DP_EN
0b
0b
0b
0b
0b
0b
0b
0b
ULPI HS USB OTG transceiver
RPD_
DP_EN
0b
1b
1b
1b
1b
1b
1b
1b
RPD_
DM_EN
0b
1b
1b
1b
1b
1b
1b
1b
© NXP B.V. 2008. All rights reserved.
Table 8
will force
HSTERM
_EN
0b
0b
1b
1b
0b
0b
0b
0b
18 of 82