Holtek BC45B4523, Manual, Page: 12 / 96

Rev. 1.20 12 October 28, 2020
BC45B4523
Registers
Register Overview
The device consists of 6-bit addressable registers which is grouped into 2 sectors. Each sector separated into
multiple pages by their functions. There are 4 types of registers, namely Dynamic, Write Only, Read/Write and
Read Only, in which their behaviours are described in the following table. The overview of the registers is shown
in the “Register List” tables.
Type Description
Dynamic (DY)
The Dynamic register is used to control behaviours of the reader IC as wells as display the status.
The Dynamic register can be either set by the external controller or automatically updated by
the internal state machine.
Write Only (W)
The write-only register is used for control behaviours of the reader IC, especially timers and
FIFO. These registers can only be written by the external controller. Reading from these
registers returns zero.
Read/Write (R/W)
The read-write register is used to configure and control behaviours of the reader IC.
These registers can be written and read by the external controller.
Read Only (R)
The read only register is used to display the status of the internal state machine.
Writing these registers will not affect their values.
—
These registers are intentionally left blank or reserved for future use, reading from these
registers returns zero.
Register Types
Register List
Sector 0
Page Addr. Register Name
Bit
7 6 5 4 3 2 1 0
Command and Status
0
0 0 Sector Select — — — — — — — Sector
0 1 Command Command[7:0]
0 2 FIFOData FIFOData[7:0]
0 3 PrimaryStatus — ModemState[2:0] IRQ ERR HiAlert LoAlert
0 4 FIFOLength — FIFOLength[6:0]
0 5 SecondaryStatus Trunning RF_Det CRCReady EMD_Det SubC_Det RxLastBit[2:0]
0 6 InterruptEnable SetIEn CDIEn TimerIEn TxIEn RxIEn IdleIEn HiAlertIEn LoAlertIEn
0 7 InterruptFlag SetIRq CDIRq TimerIRq TxIRq RxIRq IdleIRq HiAlertIRq LoAlertIRq
Control and Status
1
0 8 — — — — — — — — —
0 9 Control — WkUpCD StandBy PowerDown Crypto_MOn TStopNow TStartNow FlushFIFO
0 A Error — KeyErr — FIFOOvf CRCErr FramingErr ParityErr CollErr
0 B CollPos CollPos[7:0]
0 C TimerValue TimerValue[7:0]
0 D CRCResultLSB CRCResultLSB[7:0]
0 E CRCResultMSB CRCResultMSB[7:0]
0 F BitFraming — RxAlign[2:0] — TxLastBits[2:0]
TX and Coder
2
1 0 — — — — — — — — —
1 1 TxControl Tx1Inv ModulatorSource 100ASK Tx2Inv Tx2Cw Tx2RFEn Tx1RFEn
1 2 TxCfgCW — — TxCfgCW[5:0]
1 3 TxCfgMod — — TxCfgMod[5:0]
1 4 CoderControl Send1Pulse — CoderRate[2:0] TxCoding[2:0]
1 5 ModWidth ModWidth[7:0]
1 6 ModWidthSOF ModWidthSOF[7:0]
1 7 TypeBTxFraming NoTxSOF NoTxEOF EOFWidth CharSpacing[2:0] SOFWidth[1:0]
RX and Decoder
3
1 8 — — — — — — — — —
1 9 RxControl1 SubCPulses[2:0] SubCCarrier[1:0] LP_Off Gain[1:0]
1 A DecoderControl RxMultiple CollMarkVal ZeroAfterColl RxFraming[1:0] — RxCoding[1:0]
1 B BitPhase BitPhase[7:0]
1 C RxThreshold MinLevel[2:0] — CollLevel[2:0] —
1 D BPSKDemControl NoRxSOF NoRxEGT NoRxEOF HP2Off TauD[1:0] AGCEn TauAGC
1 E RxControl2 Cont_Int RxAutoPD — — Reserved ByPassEnv Reserved DecoderSrc
1 F RxControl3 BPSKDecMeth BPSKDataRec SOFSel15693 — — —
EMD_
Suppress
SOF43A_5Bits