Specifications

Bluegiga Technologies Oy
Page 28 of 64
it should pre-empt the
WT32i transaction.
BT_ACTIVE
Indicates to the PTA
that WT32i is initiating a
transaction
This signal is not configurable. Default is PIO7
WLAN_DENY
Used by the PTA to
deny transmission by
WT32i before it starts.
WT32i will abort a
pending transaction if
the WLAN_DENY
signal is detected
during a specific
monitoring period.
PSKEY_LC_COMBO_DISABLE_PIO_MASK (0x0028)
Coexistence scheme
Defines the coexistence
scheme used.
PSKEY_LC_COMBO_DOT11_CHANNEL_PIO_BASE
(0x002A)
Timing signals
Defines T1 signal timing
PSKEY_LC_COMBO_DOT11_T1 (0x005E)
Defines T2 signal timing
PSKEY_LC_COMBO_DOT11_T2 (0x005F)
TX/RX PIO control
Sets a GPIO to indicate
TX/RX
PSKEY_TXRX_PIO_CONTROL (0x0209)
Figure 13: WT32i HW coexistence configuration for Unity-3e
NOTE: HW coexistence only does not guarantee seamless simultaneous operation between WT32i and a
WiFi radio. As an example, Bluetooth Inquiry or scanning will cut off the Wi-Fi connection.
To implement an Unity-3e coexistence interface on WT32i the following PSKEY settings should be set:
 PSKEY_LC_COMBO_DISABLE_PIO_MASK (0x0028) = 0x0040 0x0000 0x0000
 PSKEY_LC_COMBO_DOT11_CHANNEL_PIO_BASE (0x002A) = 0x0011
 PSKEY_LC_COMBO_DOT11_T1 (0x005E) = 0x0043
 PSKEY_LC_COMBO_DOT11_T2 (0x005F) = 0x000A
 PSKEY_TXRX_PIO_CONTROL (0x0209) = 0x0001
With these settings the pin bindings for the coexistence signals will be:
Coex Signal
Pin
BT_STATUS
PIO5
BT_ACTIVE
PIO7
WLAN_DENY
PIO6
BT_PERIODIC
PIO4
Table 14: HW co-existence signals