Sierra Wireless AirPrime SL808 Series, Product Technical Specification & Customer Design Manuallines, Page: 74 / 122

Product Technical Specification & Customer Design Guidelines
74 Proprietary and Confidential - Specifications subject to change 2400058
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
Table 5-18 on
page 74.
5.8.1 Pin descriptions
Table 5-17 describes the VREF_1V8 output pin.
See Digital I/O electrical information on page 39 for 1V8 voltage characteristics
and reset state definitions.
Table 5-17: VREF_1V8 pin descriptions
Pin Signal I/O I/O type Description
10
VREF_1V8 O Supply 1.8 V digital supply
Table 5-18: 1.8 V connector pins
Pin Signal name Description
1
GPIO_3 General Purpose I/O
2
GPIO_2 General Purpose I/O
3
GPIO_1 General Purpose I/O
6
EXT_VREG_USIM
a
USIM VCC supply
7
EXT_USIM_RESET
a
USIM reset
8
EXT_USIM_DATA
a
USIM I/O pin
9
EXT_USIM_CLK
a
USIM clock
11
SPI_CS_N SPI chip select
12
SPI_CLK SPI clock
13
SPI_DATA_MOSI SPI data (Master Output / Slave Input)
14
SPI_DATA_MISO SPI data (Master Input / Slave Output)
45
UART1_RXD UART Receive Data
46
UART1_TXD UART Transmit Data
47
UART1_RTS_N UART Request To Send
48
UART1_CTS_N UART Clear To Send
64
PCM_SYNC PCM sync
65
PCM_DOUT PCM data output
66
PCM_DIN PCM data input
67
PCM_CLK PCM clock
63
SYSTEM_RESET_N Reset