UPD360 datasheet(148/221 Pages) MICROCHIP

148 / 221 page

UPD360

DS00002084C-page 148

 2016-2017 Microchip Technology Inc.

11.4.2.12

RX Last GoodCRC Packet Low Byte Register (RX_LAST_GCRC_PKT_LO)

11.4.2.13

RX Message ID Stored Register (RX_MSG_ID_STORED)

This register indicates if a last message ID was stored for each SOP type. A write to the appropriate bit will clear the

last stored message ID for the SOP type indicated. When cleared, the next packet received for the SOP type will not be

considered a duplicate. Software should clear the appropriate bit when it processes a Soft Reset.

Bits in this register are set by hardware and must be cleared by software.

This register is also cleared when software issues a SW_RESET or PD_RESET via the Reset Control Register

(RESET_CTL).

11.4.2.14

RX Maximum Packet Size Register (RX_MAX_SIZE)

The value of this register sets the maximum receive packet size, including the 4 bytes of CRC.

Address:

1A4Bh

Size:

8 bits

Bits

Description

Type

Default

7:0

RX_LAST_GCRC_PKT_LO

Bits [7:0] of received GoodCRC message.

This register is only valid when auto-retry is enabled. Since GoodCRC mes-

sage in auto-retry mode is not stored in the RX queue, this register provides a

means for software to examine the last GoodCRC message received.

00h

Address:

1A4Ch

Size:

8 bits

Bits

Description

Type

Default

7:5

RESERVED

4:0

RX_MSG_ID_STORED

This field indicates that a last message ID was stored for the SOP type.

Bit 0: SOP

Bit 1: SOP'

Bit 2: SOP''

Bit 3: SOP'_Debug

Bit 4: SOP''_Debug

W1C

00000b

Address:

1A4Dh

Size:

8 bits

Bits

Description

Type

Default

7:0

RX_MAX_SIZE

Maximum receive packet size including the 4 byte CRC.

R/W

22h

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