Fig 5 Rh-9 Lcd Module - Nokia RH-9 Series Ccs Technical Documentation

CCS Technical Documentation
Parameter
BSI comparator Threshold
BSI comparator Hysteresis (1)
Note: (1) Hysteresis is defined as [Vkey(+)-Vkey(-)] / 2
VFLASH1
Vkey(+)
Vkey
Vkey(-)
GND
The whole SIM interface is located in the two ASICs, UPP and UEM.
The SIM interface in the UEM contains power up/down, port gating, card detect, data
receiving, ATR-counter, registers and level shifting buffers logic. The SIM interface is the
electrical interface between the Subscriber Identity Module Card (SIM Card) and mobile
phone (via UEM device).
The data communication between the card and the phone is asynchronous half duplex.
The clock supplied to the card is 3.25 MHz. The data baudrate is SIM card clock fre-
quency divided by 372 (by default), 64, 32 or 16. The protocol type, that is supported, is
T=0 (asynchronous half duplex character transmission as defined in ISO 7816-3).
Issue 1 11/02
Table 26: BSI Detection
Variable Min
Vkey 1.94
Vsimhyst 50
Figure 6: BSI Detection
Example of BSI detection
SIMCARDBSdetection
ãNokia Corporation
System Module & UI
Typ Max
2.1 2.26
75 100
BSI
RH-9
Unit
V
mV
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