WT11i-A-HCI21 Bluegiga Technologies, WT11i-A-HCI21 Datasheet - Page 35

• Manufacturer Part Number: WT11i-A-HCI21
• Description: Bluetooth / 802.15.1 Modules WT11i Class1 2.1 Mod Chip Ant HCI Firmwr
• Manufacturer: Bluegiga Technologies

Specifications of WT11i-A-HCI21

• Rohs: yes
• Class: 1
• Sensitivity: - 83 dBm
• Data Rate: 3 Mbps
• Operating Supply Voltage: 3.3 V
• Interface Type: SPI, UART, USB
• Antenna Connector Type: Chip
• Maximum Operating Temperature: + 85 C
• Dimensions: 35.8 mm x 14.5 mm x 2.3 mm
• Mounting Style: SMD/SMT

10 Reset
WT11i may be reset from several sources: RESET pin, power on reset, a UART break character or via
software configured watchdog timer. The RESET pin is an active low reset and is internally filtered using the
internal low frequency clock oscillator. A reset will be performed between 1.5 and 4.0ms following RESETB
being active. It is recommended that RESET be applied for a period greater than 5ms.
The power on reset occurs when the VDD_CORE supply internally to the module falls below typically 1.5V
and is released when VDD_CORE rises above typically 1.6V. At reset the digital I/O pins are set to inputs for
bidirectional pins and outputs are tri-state.
10.1 Pin States on Reset
PIN NAME
PIO[7:2]
PCM_OUT
PCM_IN
PCM_SYNC
PCM_CLK
UART_TX
UART_RX
UART_RTS
UART_CTS
USB+
USB-
SPI_CSB
SPI_CLK
SPI_MOSI
SPI_MISO
AIO[1]
STATE
Input with weak pull-down
Tri-staed with weak pull-down
Input with weak pull-down
Input with weak pull-down
Input with weak pull-down
Output tristated with weak pull-up
Input with weak pull-down
Output tristated with weak pull-up
Input with weak pull-down
Input with weak pull-down
Input with weak pull-down
Input with weak pull-down
Input with weak pull-down
Input with weak pull-down
Output tristated with weak pull-down
Output, driving low
Table 14: Pin States on Reset
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