CSR1001A04-IQQA-R Datasheet, PDF (23/45 Pages) –

Any of the PIO lines can be configured as interrupt request lines or to wake the IC from deep sleep mode. Table
4.1 lists the options for waking the IC from the sleep modes.
Sleep Mode
Dormant
Hibernate
Deep Sleep
Wake-up Options
Can only be woken by the WAKE pin.
Can be woken by the WAKE pin or by the watchdog timer.
Can be woken by any PIO configured to wake the IC.
Table 4.1: Wake Options for Sleep Modes
The CSR1001 QFN supports alternative functions on the PIO lines:
■ SPI interface, see Section 1.2 and Section 5.4
■ _{UART, see Section 1.2 and Section 5.1.1}
■ _{LED flasher / PWM module, see Section 4.5}
Note:
CSR cannot guarantee that the PIO assignments remain as described. Implementation of the PIO lines is
firmware build-specific, for more information see the relevant software release note.
CSR1001 QFN has 3 general-purpose analogue interface pins, AIO[2:0].
4.5 LED Flasher / PWM Module
CSR1001 QFN contains a LED flasher / PWM module that works in sleep modes.
These functions are controlled by the on-chip firmware.
4.6 Temperature Sensor
CSR1001 QFN contains a temperature sensor that measures the temperature of the die to an accuracy of 1 °C.
4.7 Battery Monitor
CSR1001 QFN contains an internal battery monitor that reports the battery voltage to the software.
Production Information
© Cambridge Silicon Radio Limited 2011-2013
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CS-216358-DSP5
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