Signals; Pxa27X Processor Usim Interface Signals - Intel PXA27 Series Design Manual

USIM Controller Interface
19.2

Signals

This section describes the PXA27x processor I/O signals used by the USIM interface. See
Figure 19-1
USIM card.
19.2.1

PXA27x Processor USIM Interface Signals

See Table 19-1
USIM card.
Table 19-1. PXA27x Processor Interface Signals Summary (Sheet 1 of 2)
Name
UIO
1
UVS0
1
nUVS1
1
nUVS2
UCLK
nURST
2
UDET
2
UEN
II:19-2
for illustration of the connectivity between the PXA27x processor and the external
for the list of all PXA27x processor signals between the USIM interface and the
Type
USIM I/O Data. UIO – receive and transmit data connection
The bidirectional signal is connected directly to the off-chip USIM card. When
the PXA27x processor transmits a logic 0, the UIO signal is driven low. For
Bidirectional
transmitting a logic 1, the UIO line is pulled-up by the 20 k
The USIM card also acts as a pull-down on the UIO line.
NOTE: Leave the UIO signal disconnected if USIM controller is never
intended to be used.
Select for power transistor controlling voltage level supplied for card
Output
Active high signal, assertion of UVS0 must ground (0V) VCC on the USIM card
VCC power-supply signal
Select for power transistor controlling voltage level supplied for card
Output
nUVS1 assertion selects 1.8 V on the USIM card VCC power-supply signal
Select for power transistor controlling voltage level supplied for card
Output
nUVS2 assertion selects 3.0 V on the USIM card VCC power-supply signal
Clock supplied to the USIM card
Output
This signal connects directly to the card CLK signal. The card cannot use any
other clock.
Reset signal to card
Output
The card is reset when this output is asserted
Output USIM Detection for card present
Output USIM Enable for VCC_USIM connection
Description
Intel® PXA27x Processor Family Design Guide
Ω
pull-up resistor.