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ST5451D 数据表(PDF) 9 Page - STMicroelectronics |
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ST5451D 数据表(HTML) 9 Page - STMicroelectronics |
9 / 34 page CAC Channel Activation CAC = 1 : Activate RX and TX CAC = 0 : deactivate RX and TX NHF HDLC Function Select NHF = 1 : disable HDLC function FLA Flag FLA = 1 : transmit shared flags FLA = 0 : transmit two flags between consecutive frames. RFBC Receive Frame Byte Counter After reset 00 RDC7 RDC6 RDC5 RDC4 RDC3 RDC2 RDC1 RDC0 RDC 0/7 Receive Data Count Total number of bytes of received frame without CRC. RDC 0/4 Indicate the number of bytes in the cur- rent block available in RFIFO. RDC 5/7 Indicate the number of 32 bytes blocks received. If the frame exceeds 223 bytes, RDC 5/7 hold the value ”111”, only RDC 4/0 continue to count modulo 32. See Table 3. The contents of the register are valid after an RME interrupt. The µP must read N+1 bytes to transfer the number of bytes received and the status byte into the memory. CIX1 Command/Indicate Transmit Register 1 After reset FFH (GCI only) 1 1 1 1 C1C2 C3C4 C1, C2, C3, C4: Code to be transmitted permanently in the outgoing GCI C/I channel. CIR1 Command/Indicate Receive Register 1 After reset FFH (GCI only) 1 1 1 1 C1C2 C3C4 C1, C2, C3, C4: Incoming GCI C/I channel. MONX1 Monitor Transmit Register 1 After reset FFH (GCI only) M1 M2 M3 M4 M5 M6 M7 M8 The value written in MONX1 is trans- mitted in the outgoing Monitor channel according to GCI transfer protocol. XMR1 interrupt indicates when MONX1 is again available. MONR1 Monitor Receive Register 1 After reset FFH (GCI only) M1 M2 M3 M4 M5 M6 M7 M8 The value read from MONR1 gives the value of the byte received in the moni- tor channel according to GCI transfer protocol. RMR1 interrupt indicates when a new byte is available in MONR1 register. CIX2 Command/Indicate Transmit Register 2 After Reset FFH (GCI and TE mode only) 1 1 P1 P2 P3 P4 P5 P6 P1/P6 Code transmitted permanently in the 2nd GCI C/I channel. CIR2 Command/Indicate Receive Register 2 After reset FFH (GCI and TE mode selected only) 1 1 P1 P2 P3 P4 P5 P6 P1/P6 The contents of the 2nd C/I channel; they are the different requests received from TE peripheral devices to µP. Six peripherals can make a simultane- ous request. MONX2 Monitor Transmit Register 2 After reset FFH (GCI and TE mode only) The value written in MONX2 is trans- mitted in the 2nd GCI M channel to a peripheral (if PI= 1; register CF). ST5451 9/34 |
类似零件编号 - ST5451D |
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类似说明 - ST5451D |
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