User Guide

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NVCYCLE - Non-Volatile Refresh Cycles
Non-Volatile Address = 0xC4-0xC5
These read-only non-volatile registers contain the number of lifetime
refresh cycles performed for the non-volatile memory. The minimum lifetime
refreshes is 2,000 refresh cycles. Beyond this the refreshes may not be
complete and the module’s operation can become unpredictable.
Between 8 and 150 non-volatile write operations can be made before
a refresh cycle is necessary. Writing the registers from lowest to highest
address maximizes the number of write operations per refresh cycle.
It is recommended to write the desired default values to non-volatile
memory and use the volatile registers for values that change frequently.
These registers show the total number of refresh cycles that have occurred.
This gives an indication of the remaining life expectancy of the memory.
Figure 68 shows the Non-Volatile Refresh Cycles registers.
HumPRC
TM
Series Non-Volatile Refresh Cycles Registers
Name
Non-Volatile
Address
Description
NVCYCLE1 0xC4 MSB of the number of refresh cycles
NVCYCLE0 0xC5 LSB of the number of refresh cycles
Figure 68: HumPRC
TM
Series Non-Volatile Refresh Cycles Registers
LSTATUS - Output Line Status
Volatile Address = 0xC6
This register contains the logic states of the HumPRO
TM
indicator lines.
Many of these status lines are not connected to an external line in the
HumPRC
TM
Series, but this register shows their logical state. Please see the
HumPRO
TM
Series Data guide for a full description of these lines.
Each bit in the byte that is returned by the read represents the logic state
of one of the output indicator lines. Figure 70 shows which line each bit
represents.
Figure 69: HumPRC
TM
Series Transceiver Output Line Status Command and Response
HumPRC
TM
Series Output Line Status
Read Command Read Response
Header Size Escape Escape Address ACK Address Value
0xFF 0x03 0xFE 0xFE 0x46 0x06 0xC6 LSTATUS
HumPRC
TM
Series Output Line Status LSTATUS Values
LSTATUS Bit Line Status
0 EX – Exception, 1 = exception has occurred
1 PA_EN – PA Enable, 1 = the transmitter is active
2 LNA_EN – LNA Enable, 1 = the receiver is active
3 CTS – Clear To Send, undefined
4 MODE_IND – Mode Indicator, 1 = RF data transfer is active (TX or RX)
5 BE – Buffer Empty, 1 = UART buffer is empty
6 ACK_OUT – Acknowledgement Output, 1 = ACK was received
7 Reserved, 0
Figure 70: HumPRC
TM
Series Output Line Status LSTATUS Values