ISP1181BDGG,112 STEricsson, ISP1181BDGG,112 Datasheet - Page 23

• Manufacturer Part Number: ISP1181BDGG,112
• Manufacturer: STEricsson

Specifications of ISP1181BDGG,112

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Package Type: TSSOP
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1181B_3
Product data sheet
11.2 Resume conditions
11.3 Control bits in suspend and resume
A wake-up from the suspend state is initiated either by the USB host or by the application:
The steps of a wake-up sequence are as follows:
Table 12.
Register
Interrupt
Interrupt Enable
1. The internal oscillator and the PLL multiplier are re-enabled. When stabilized, the
2. The SUSPEND output is deasserted, and bit RESUME in the Interrupt register is set.
3. Maximum 15 ms after starting the wake-up sequence, the ISP1181B resumes its
4. In case of a remote wake-up, the ISP1181B drives a K-state on the USB bus for
5. Following the deassertion of output SUSPEND, the application restores itself and
6. After wake-up, the internal registers of the ISP1181B are write-protected to prevent
Fig 7.
•
•
USB host: drives a K-state on the USB bus (global resume)
Application: remote wake-up through a HIGH level on input WAKEUP or a LOW
level on input CS (if enabled using bit WKUPCS in the Hardware Configuration
register). Wake-up on CS will work only if V
clock signals are routed to all internal circuits of the ISP1181B.
This will generate an interrupt if bit IERESM in the Interrupt Enable register is set.
normal functionality.
10 ms.
other system components to the normal operating mode.
corruption by inadvertent writing during power-up of external components. The
firmware must send an Unlock Device command to the ISP1181B to restore its full
functionality.
SUSPEND and WAKEUP signals in a powered-off modem application.
Summary of control bits
USB
Bit
SUSPND
BUSTATUS
RESUME
IESUSP
IERESM
V BUS
Rev. 03 — 23 January 2009
DP
DM
ISP1181B
V BUS
SUSPEND
WAKEUP
Function
a transition from awake to the suspend state was detected
monitors USB bus status (logic 1 = suspend); used when
interrupt is serviced
a transition from suspend to the resume state was detected
enables output INT to signal the suspend state
enables output INT to signal the resume state
BUS
RING DETECTION
Full-speed USB peripheral controller
is present.
V CC
RST
8031
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