NXP Semiconductors K32 L2A Series, Reference Manual, Page: 510 / 1379

21.5.19 General Purpose Counter 1 Timeout Value
(EMVSIMx_GPCNT1_VAL)
Address: 4004_E000h base + 48h offset = 4004_E048h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
GPCNT1
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
EMVSIMx_GPCNT1_VAL field descriptions
Field Description
31–16
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
GPCNT1 General Purpose Counter 1 Timeout Value
The value written to this register will be used to compare to the general purpose counter in the EMV SIM
module. Once the General purpose counter reaches this value, the GPCNT1 flag in the XMT_STATUS
register will be set. This counter is intended to be used for any events that must be monitored for duration
based on the card clock, receiver sample rate, or ETU rate (transmit clock). Example: ATR arrival time and
ATR duration.
Functional Description
21.6.1 Initialization
21.6.1.1 Configuring EMV SIM
The first operation that must be done is to configure the EMV SIM interface signals to
allow the EMV SIM Transmit or Receive operation to commence. The following steps
describe a typical way to enable the Smart Card:
• Configure prescaler by programming the desired value in PRSC register to generate
the card clock. The card clock frequency is calculated as:
• f
SIM
/ (PRSC[7:0]); where f
SIM
is the EMV SIM Clock Frequency
• Prescaler value must be set such that the maximum card clock frequency
specification set by EMV & ISO-7816 specifications are not violated
• Configure the DIVISOR_VALUE in the Baud Rate Divisor Register. This value
determines the ETU period to be used by the transmitter or receiver
• Enable power to the Smart Card by setting the VCC_EN bit in PCSR register
• Enable the Smart Card clock by setting the SCEN bit in PCSR register
21.6
Functional Description
K32 L2A Reference Manual, Rev. 2, 01/2020
510 NXP Semiconductors