ISP1183BS STEricsson, ISP1183BS Datasheet - Page 24

• Manufacturer Part Number: ISP1183BS
• Manufacturer: STEricsson

Specifications of ISP1183BS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 12.
ISP1183_3
Product data sheet
Register
Interrupt
Interrupt Enable
Mode
Hardware
Configuration
Unlock
Summary of control bits
11.2 Resume conditions
11.3 Control bits in suspend and resume
Bit
SUSPND
BUSTATUS
RESUME
IESUSP
IERESUME
SOFTCT
GOSUSP
EXTPUL
WKUPCS
all
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:
1. The internal oscillator and the PLL multiplier are re-enabled. When stabilized, clock
2. The SUSPEND output is de-asserted, and bit RESUME in the Interrupt register is set.
3. Maximum 15 ms after starting the wake-up sequence, the ISP1183 resumes its
4. In case of a remote wake-up, the ISP1183 drives a K-state on the USB bus for 10 ms.
5. Following the de-assertion of output SUSPEND, the application restores itself and
6. After wake-up, the internal registers of the ISP1183 are write-protected to prevent
•
•
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_N (if enabled using bit WKUPCS in the Hardware Configuration
register). Wake-up on CS_N will work only if V
signals are routed to all internal circuits of the ISP1183.
This will generate an interrupt if bit IERESUME in the Interrupt Enable register is set.
normal functionality.
other system components to normal operating mode.
corruption by inadvertent writing during power-up of external components. Firmware
must send an Unlock Device command to the ISP1183 to restore its full functionality.
For details, see
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_N to signal the suspend state
enables output INT_N to signal the resume state
enables SoftConnect pull-up resistor to the USB bus
a HIGH-to-LOW transition enables the suspend state
selects internal (SoftConnect) or external pull-up resistor
enables wake-up on LOW level of input CS_N
sending data AA37h unlocks internal registers for writing after a resume
Section
Rev. 03 — 20 January 2009
12.4.2.
Low-power USB Peripheral Controller with DMA
BUS
is present.
© ST-NXP Wireless 2009. All rights reserved.
ISP1183
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