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NXP Semiconductors
UM191812
PN544 C2 User Manual
191812
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
User Manual
Rev. 1.2 — 2010-06-16
155 of 172
Address Name
Comment
Default
0x9898
IRQ_Config
- Bit 5 : 0 ... IRQ logical level is active HIGH (Default value)
1 ... IRQ logical level is active LOW
- Other Bits : RFU (keep unchanged)
0x02
0x9899
GPIO_Config_PEN
Gpio default configuration: PEN (Port Enable)
Each bit in the configuration register represents the GPIO pin with the
corresponding number
If set to 1, and if the corresponding PDIR is set to 0, the corresponding
GPIO is configured in input
0x00
0x9E71
PlClockRequest
Indicates how the clock is requested to the host by the PN544.
- 0x00 -> no request
- 0x01 -> request through CLKREQ pin (GPIO pin 2 set to high when
clock requested, HighZ unless, whatever GPIO default configuration)
- 0x02 -> request through NXP_EVT_CLK_REQUEST event
- Others values are RFU
0x00
0x9E72
PlClockAck
Indicates how the clock request is acknowledged by the host. Clock
acknowledgment is only valid in case of Clock request mechanism
enabled (see NXP_PlClockRequest).
- 0x00 -> acknowledged thanks to timeout (see PlClockTimeout)
- 0x01 -> acknowledged through CLKACK pin (GPIO pin 1)
- 0x02 -> acknowledged through NXP_EVT_CLK_ACK event
- Others values are RFU
0x00
0x9E6F
PlClockTimeout
Indicates the timeout value to be used for clock request acknowledgment
(up to 255ms in 1ms steps).
Recommended value is 10 ms or less.
0x0A
0x9E74
PlRfLowPower
- Bits 0 to 2: Sensitivity of the RF Low Power Mode (value between 0 and
6, 0 -> sensitivity maximal, 6 -> sensitivity minimal)
- Bits 3 to 6 are RFU
- Bit 7: use of the RF Low Power Mode (0 -> not used, 1 -> used)
0x00