ATZB-900-B0 Datasheet, PDF (14/20 Pages) ATMEL Corporation – ZigBit™ 700/800/900 MHz Wireless Modules

Specifications
Table 3-6. Pin descriptions (Continued)
Connector
Pin
Pin Name
Description
Default
State after
I/O Power on
16
17
18
19
20
21
24,25
26
27
28
29
30
31
32
UART_CTS
GPIO6
GPIO7
GPIO3
GPIO4
GPIO5
D_VCC
JTAG_TMS
JTAG_TDI
JTAG_TDO
JTAG_TCK
ADC_INPUT_3
ADC_INPUT_2
ADC_INPUT_1
CTS output (Clear To send) for UART hardware
flow control. Active low^(2)(3)(4)(7)
O
General Purpose digital Input/Output 6^(2)(3)(4)(7) I/O
General Purpose digital Input/Output 7^(2)(3)(4)(7) I/O
General Purpose digital Input/Output 3^(2)(3)(4)(7) I/O
General Purpose digital Input/Output 4^(2)(3)(4)(7) I/O
General Purpose digital Input/Output 5^(2)(3)(4)(7) I/O
Digital Supply Voltage (V_CC)⁽⁹⁾
JTAG Test Mode Select^(2)(3)(4)(6)
I
JTAG Test Data Input^(2)(3)(4)(6)
I
JTAG Test Data Output^(2)(3)(4)(6)
O
JTAG Test Clock^(2)(3)(4)(6)
I
ADC Input Channel 3^(2)(3)(7)
I
ADC Input Channel 2^(2)(3)(7)
I
ADC Input Channel 1^(2)(3)(7)
I
tri-state
tri-state
tri-state
tri-state
tri-state
tri-state
tri-state
tri-state
tri-state
33
BAT
ADC Input Channel 0, used for battery level
measurement. This pin equals V_CC/3.^(2)(3)(7)
I
tri-state
34
A_VREF
Input/Output reference voltage for ADC
I/O
tri-state
35
AGND
36
GPIO_1WR
Analog ground
1-wire interface^(2)(3)(4)(7)
I/O
37
UART_DTR
DTR input (Data Terminal Ready) for UART.
Active low^(2)(3)(4)(7)
I
tri-state
38
USART0_RXD
USART/SPI Receive pin^(2)(3)(4)(7)
I
tri-state
39
USART0_TXD
USART /SPI Transmit pin^(2)(3)(4)(7)
O
tri-state
40
USART0_EXTCLK
USART/SPI External Clock^(2)(3)(4)(7)
I/O
tri-state
41
GPIO8
General Purpose Digital Input/Output 8^(2)(3)(4)(7) I/O
tri-state
42
IRQ_7
Digital Input Interrupt request 7^(2)(3)(4)(7)
I
tri-state
43
IRQ_6
Digital Input Interrupt request 6^(2)(3)(4)(7)
I
tri-state
44,46,48
RF GND
RF Analog Ground
45
RFP_IO
Differential RF Input/Output
I/O
47
RFN_IO
Differential RF Input/Output
I/O
Notes:
1. The UART_TXD pin is intended for input (i.e. its designation as "TXD" implies some complex system
containing ZigBit 900 as its RF terminal unit), while UART_RXD pin, vice versa, is for output.
2. Most of pins can be configured for general purpose I/O or for some alternate functions as described in
details in the ATmega1281V Datasheet [1].
3. GPIO pins can be programmed either for output, or for input with/without pull-up resistors. Output pin
drivers are strong enough to drive LED displays directly (refer to figures on pages 387-388, [1]).
4. All digital pins are provided with protection diodes to D_VCC and DGND
ZigBit™ 700/800/900 MHz Wireless Modules
3-7
8227C–MCU Wireless–06/09