User's Manual

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PIO[6] / CLK_REQ
This is multifunction terminal, its function is determined by Persistent Store Keys. Using
PSKEY_CLOCK_REQUEST_ENABLE, (0x246) this terminal can be configured to be low
when WT12 is in deep sleep and high when a clock is required. The clock must be supplied
within 4ms of the rising edge of PIO[6] to avoid losing timing accuracy in certain Bluetooth
operating modes.
PIO[7]
Programmable I/O terminal.
10. RESET
The RESET pin is an active high reset and is internally filtered using the internal low
frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following
RESET being active. It is recommended that RESET be applied for a period greater than
5ms.
11. SOFTWARE STACKS
WT12 is supplied with Bluetooth v2.0 + EDR compliant stack firmware, which runs on the
internal RISC microcontroller.
The WT12 software architecture allows Bluetooth processing and the application program
to be shared in different ways between the internal RISC microcontroller and an external
host processor (if any). The upper layers of the Bluetooth stack (above HCI) can be run
either on-chip or on the host processor.