Power Rail (Vref_1V8); Pin Descriptions - Sierra Wireless AirPrime SL808 Series Product Technical Specification & Customer Design Manuallines

Product Technical Specification & Customer Design Guidelines
74 Proprietary and Confidential - Specifications subject to change

5.8 Power rail (VREF_1V8)

The AirPrime SL808X Embedded Module includes a rail that the host uses to
provide a 1.8 V logic reference (maximum limit) for the pins listed in
page 74.

5.8.1 Pin descriptions

Table 5-17 describes the VREF_1V8 output pin.
See Digital I/O electrical information
and reset state definitions.
Table 5-17: VREF_1V8 pin descriptions
Pin Signal
VREF_1V8
10
Table 5-18: 1.8 V connector pins
Pin Signal name
GPIO_3
1
GPIO_2
2
GPIO_1
3
EXT_VREG_USIM
6
EXT_USIM_RESET
7
EXT_USIM_DATA
8
a
EXT_USIM_CLK
9
SPI_CS_N
11
SPI_CLK
12
SPI_DATA_MOSI
13
SPI_DATA_MISO
14
UART1_RXD
45
UART1_TXD
46
UART1_RTS_N
47
UART1_CTS_N
48
PCM_SYNC
64
PCM_DOUT
65
PCM_DIN
66
PCM_CLK
67
SYSTEM_RESET_N
63
on page 39 for 1V8 voltage characteristics
I/O
O Supply
Description
General Purpose I/O
General Purpose I/O
General Purpose I/O
a
USIM VCC supply
a
USIM reset
a
USIM I/O pin
USIM clock
SPI chip select
SPI clock
SPI data (Master Output / Slave Input)
SPI data (Master Input / Slave Output)
UART Receive Data
UART Transmit Data
UART Request To Send
UART Clear To Send
PCM sync
PCM data output
PCM data input
PCM clock
Reset
Table 5-18
I/O type Description
1.8 V digital supply
on
2400058