ISP1109BS-T ST-Ericsson Inc, ISP1109BS-T Datasheet - Page 9

• Manufacturer Part Number: ISP1109BS-T
• Description: IC TXRX SERIAL BUS UNIV 32HVQFN
• Manufacturer: ST-Ericsson Inc
• Type: Transceiverr

Specifications of ISP1109BS-T

• Number Of Drivers/receivers: 1/1
• Protocol: USB 2.0
• Voltage - Supply: 3 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Philips Semiconductors
7. Functional description
9397 750 13355
Product data sheet
7.1 Serial controller
7.2 V
7.3 ID detector
The serial controller includes the following functions:
The serial controller acts as an SPI slave or I
All the registers are the same as that in SPI or I
registers are accessed in 8-bit width (bits 0 to 7) for each address. In SPI mode, there are
25 bits for each address, only bits 0 to 7 are useful while bits 8 to 24 are don’t cares.
At hardware reset including power-on reset, the level on pin SPI_I2C_SEL will determine
whether the SPI or I
selected. If SPI_I2C_SEL = HIGH, the I
The V
session valid comparator threshold voltage (V
bit VBUS_DET of the Interrupt Source register. If V
stored.
In normal power mode, that is, when both V
senses the condition of the ID line and can differentiate between the following three
conditions:
The recommended procedure to detect the status of ID using software is:
1. When nothing is connected, ID is in the ID_FLOAT state. Enable the ID_FLOAT
2. If an interrupt occurs, read the Interrupt Latch register. If ID changes, bit ID_FLOAT is
3. The software waits for sometime, for example: 100 ms, to allow mechanical
4. The software reads the Interrupt Source register, and checks bits ID_FLOAT and
•
•
•
•
•
•
•
•
BUS
Serial Controller interface (SPI or I
Device Identification registers
Control registers
Interrupt registers
Interrupt generator.
ID pin is floating (bit ID_FLOAT = 1)
ID pin is shorted to ground (bit ID_GND = 1)
ID pin is connected to ground through resistor R
are logic 0).
interrupt (falling edge).
set.
debounce.
ID_GND.
BUS
detector
detector provides voltage level detection on V
2
C-bus interface is active. If SPI_I2C_SEL = LOW, the SPI interface is
Rev. 01 — 14 July 2005
2
C-bus)
2
C-bus interface is selected.
CC
2
th(svc)
C-bus slave.
and V
2
C-bus mode. In I
), logic 1 will be stored in
BUS
USB transceiver with carkit support
DN(ID)
CC(I/O)
is below V
BUS
(bits ID_FLOAT and ID_GND
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
. If V
are present, the ID detector
BUS
2
th(svc)
C-bus mode, the
is above the V
, logic 0 will be
ISP1109
BUS
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