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USIM Controller Interface
19.3
Block Diagram
See
Figure 19-1
the PXA27x processor and external USIM card.
1.8 V and 3.0 V USIM cards.
up from sleep and standby power modes in response to a falling or rising edge of UDET. This
configuration only supports 1.8 V or 3.0 V USIM cards without any additional logic.
Refer to
Section 3.8.1.15, "Power Manager USIM Card Control/Status Register (PUCR),"
Clocks and Power Manager Unit section of the Intel
Manual for information on control/status programmability.
Figure 19-1. Connectivity USIM Card and PXA27x Processor USIM Interface using UVSx
signals
PXA27x
TXD_OE_N
Processor
USIM
Interface
II:19-4
and
Figure 19-2
for illustrations of the alternate connectivity scenarios between
Figure 19-2
PAD
RXD
nUVS2
nUVS1
UVS0
UCLK
nURST
Figure 19-1
shows configurations supporting both
uses nUEN signal to allow the USIM controller to wake
®
PXA27x Processor Family Developers
UIO
20K Ω
VCC_USIM
3V
1.8V
Intel® PXA27x Processor Family Design Guide
in the
I/O
USIM
Card
VCC
GND
CLK_CARD
CARD_RST
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