isp1109 NXP Semiconductors, isp1109 Datasheet - Page 17

• Manufacturer Part Number: isp1109
• Description: Universal Serial Bus Transceiver With Carkit Support
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 12:
[1]
[2]
[3]
[4]
[5]
[6]
[7]
9397 750 13355
Product data sheet
USB mode
VP_VM
DAT_SE0
Some of the modes and signals are provided to achieve backward compatibility with IP cores.
TxD+ and TxD are single-ended inputs to drive the DP and DM outputs, respectively, in single-ended mode.
RxD+ and RxD are the outputs of the single-ended receivers connected to DP and DM, respectively.
TxD is the input to drive DP and DM in DAT_SE0 mode.
FSE0 is to force an SE0 on the DP and DM lines in DAT_SE0 mode.
RxD is the output of the differential receiver.
RSE0 is an output, indicating that an SE0 is received on the DP and DM lines.
USB functional modes: I/O values
[1]
unidirectional
bidirectional
unidirectional
bidirectional
8.4.1 Transparent UART mode
8.3 USB modes
8.4 Transparent modes
The four USB modes of the ISP1109 are:
In VP_VM USB mode, pin DAT/VP is used for the VP function, pin SE0/VM is used for the
VM function, and pin RCV is used for the RCV function.
In DAT_SE0 USB mode, pin DAT/VP is used for the DAT function, pin SE0/VM is used for
the SE0 function, and pin RCV is not used.
In unidirectional mode, pins DAT/VP and SE0/VM are always input. In bidirectional mode,
the direction of these signals depends on input OE_N.
Table 12
When in transparent UART mode, an SoC (with the UART controller) communicates
through the ISP1109 to another UART device that is connected to its DP and DM lines.
The ISP1109 operates as logic level translator between the following pins, depending on
the setting of register bit UART_PIN_SEL.
•
•
•
•
•
Bit
DAT_SE0
0
1
VP_VM unidirectional mode
VP_VM bidirectional mode
DAT_SE0 unidirectional mode (default)
DAT_SE0 bidirectional mode.
If UART_PIN_SEL = 0 (default):
– For the TxD signal: From UART_TXD (V
– For the RxD signal: From DP (REG3V3 level) to UART_RXD (REG3V3 level).
specifies the functionality of the device during the four USB modes.
BI_DI
0
1
0
1
Rev. 01 — 14 July 2005
Pin
OE_N
X
LOW
HIGH
X
LOW
HIGH
DAT/VP
TxD+
TxD+
RxD+
TxD
TxD
RxD
[4]
[4]
[6]
[2]
[2]
[3]
CC(I/O)
SE0/VM
TxD
TxD
RxD
FSE0
FSE0
RSE0
USB transceiver with carkit support
level) to DM (REG3V3 level)
[2]
[2]
[3]
[5]
[5]
[7]
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
VP
RxD+
[6]
VM
RxD
ISP1109
[6]
RCV
RxD
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[6]