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Getting Started
20BL51E00 E2

2020-03-27 Page 37
2.8.3 Configuring Wireless Functions
You can configure the following by accessing a configuration register on the SMBus:

Enable/disable power for a wireless interface card

Switch SIM card allocation to wireless interface cards
The smb2_ctrl tool included in the Windows ERTC/SMB Support Package (13Y021-70)
gives easy access to SMBus/I2C registers .
Usage Examples

Disable the power supply for a wireless interface card:

Toggle the allocation of SIM cards to wireless interface card:
2.8.4 Switching Serial Interfaces
The GPIO controller instance 1 in the FPGA is used to activate or switch serial interfaces
from UART to digital I/O. The functions are switched via multiplexers.
The default device name of the instance 1 of the GPIO controller 16z034_GPIO is "z17_2".
Table 1. Functions of GPIO controller instance 1
Interface Multiplexer (mux_if0)
The interface multiplexer 0 is used to change the serial interface 1 (X11) from UART
(default setting) to digital I/O (required if you want to use the SA15 SA-Adapter in this
slot).
Table 2. Interface Multiplexer 0 truth table
The interface is switched using the following command:
See Chapter 5.1.2.2 SIM Card, PCIe MiniCard Power Signals SMB Register (
0x42
) on
page 86 for the register description.
> smb2_ctrl smb2_1 -a=0x42 wb -d=0xf7
This disables card A.
> smb2_ctrl smb2_1 -a=0x42 wb -d=0xef
This also disables power supply.
Bit Position
Output Function
(GPO)
Input Function (PSR) Default Setting
5 mux_if2 - GPO(5):drive 0
6 mux_if0 - GPO(6):drive 0
7 mux_if1 - GPO(7):drive 0
Interface Function mux_if0
SA0 UART0 0
Digital I/O 1
z17_io z17_2 -p=6 -s=1 -h