PSB2115FV1.2D Lantiq, PSB2115FV1.2D Datasheet - Page 187
PSB2115FV1.2D
Manufacturer Part Number
PSB2115FV1.2D
Description
Manufacturer
Lantiq
Datasheet
1.PSB2115FV1.2D.pdf
(317 pages)
Specifications of PSB2115FV1.2D
Lead Free Status / Rohs Status
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PSB 2115
PSF 2115
Operational Description
A frame longer than 32 bytes is transferred to the microcontroller in blocks of 32 bytes
plus one remainder of length 1 to 32 bytes. The reception of a 32-byte block is reported
by a Receive Pool Full (RPF) interrupt and the data in RFIFOD remains valid until this
interrupt is acknowledged (RMC). This process is repeated until the reception of the
remainder block is completed, as reported by RME (figure 88). If the second RFIFOD
pool has been filled or an end-of frame is received while a previous RPF or RME interrupt
is not yet acknowledged by RMC, the corresponding interrupt will be generated only
when RMC has been issued. When RME has been indicated, bits 0-4 of the RBCLD
register represent the number of bytes stored in the RFIFOD. Bits 7 to 5 of RBCLD and
bits 0 to 3 of RBCHD indicate the total number of 32-byte blocks which where stored until
the reception of the remainder block. When the total frame length exceeds 4095 bytes,
bit OV (RBCHD) is set but the counter is not blocked.
The contents of RBCLD, RBCHD and RSTAD registers are valid only after the
occurrence of the RME interrupt, and remain valid until the microprocessor issues an
acknowledgment (RMC). The contents of RHCRD and/or SAPR, also remain valid until
acknowledgment.
If a frame could not be stored due to a full RFIFOD, the microcontroller is informed of this
via the Receive Frame Overflow interrupt (RFO).
Semiconductor Group
187
11.97
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