CP2201 datasheet(61/108 Pages) SILABS

61 / 108 page

CP2200/1

Rev. 1.0

Bits 7–4: UNUSED. Read = 0000b, Write = don’t care.

Bit 3:

RXINH: Receive Inhibit

Setting this bit to ‘1’ temporarily inhibits new packet reception. If a packet is currently being

received, reception will continue until the packet is received. Once set, this bit must be cleared to ‘0’

by software to resume packet reception.

Bit 2:

RXCLRV: Valid Bit Clear

Writing a ‘1’ to this bit clears the valid bit of the current packet, freeing up the buffer for new packets.

This action should only be started after all bytes of the current packet have been read (CPEND = 1).

If the packet is not completely read, RXSKIP should be used to discard the remaining bytes.

Bit 1:

RXSKIP: Skip Current Packet

Writing a ‘1’ to this bit updates discards the current packet by clearing its valid bit and advances the

AutoRead buffer pointer to the beginning of the next packet.

Bit 0:

RXCLEAR: Receive Buffer Clear

Writing a ‘1’ to this bit discards all packets in the receive buffer and resets all buffer pointers and

valid bits to zero. Note: Any packets currently in the buffer will remain in memory, however, all infor-

mation such as the starting address and length of each packet will be lost. Any new packets that

arrive will overwrite the existing data.

R/W

Reset Value

—

RXINH

RXCLRV

RXSKIP RXCLEAR 00000000

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address:

0x11

Bits 7–2: UNUSED. Read = 000000b, Write = don’t care.

Bit 1:

CPEND: Current Packet End Reached

This bit is automatically cleared by hardware when the valid bit for the current packet is cleared (see

RXCLRV description) or the current packet is discarded (see RXSKIP description).

0: The last byte of the current packet has not been read using the AutoRead interface.

1: The last byte of the current packet has been read using the AutoRead interface.

Bit 0:

RXBUSY: Receiving Packet

0: Receive interface is idle.

1: Receive interface is currently receiving a packet.

R/WR/W

Reset Value

—

CPEND

RXBUSY 00000000

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address:

0x12

CP2201 Datasheet(PDF) 61 Page - Silicon Laboratories

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