K60P100M100SF2RM Datasheet, PDF (1141/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Field
16
TS_AVAIL
15
TS_TIMER
14–0
Reserved
Chapter 44 10/100-Mbps Ethernet MAC (ENET)
ENET_EIMR field descriptions (continued)
TS_AVAIL interrupt mask
Description
Corresponds to interrupt source TS_AVAIL defined by the EIR register and determines whether an
interrupt condition can generate an interrupt. At every module clock, the EIR samples the signal
generated by the interrupting source. The corresponding EIR TS_AVAIL bit reflects the state of the
interrupt signal even if the corresponding EIMR bit is cleared.
TS_TIMER interrupt mask
Corresponds to interrupt source TS_TIMER defined by the EIR register and determines whether an
interrupt condition can generate an interrupt. At every module clock, the EIR samples the signal
generated by the interrupting source. The corresponding EIR TS_TIMER bit reflects the state of the
interrupt signal even if the corresponding EIMR bit is cleared.
This read-only field is reserved and always has the value zero.
44.3.3 Receive Descriptor Active Register (ENET_RDAR)
RDAR is a command register, written by the user, indicating the receive descriptor ring
has been updated (the driver produced empty receive buffers with the empty bit set).
When the register is written, the RDAR bit is set. This is independent of the data actually
written by the user. When set, the MAC polls the receive descriptor ring and processes
receive frames (provided ECR[ETHER_EN] is also set). After the MAC polls a receive
descriptor whose empty bit is not set, MAC clears RDAR and ceases receive descriptor
ring polling until the user sets the bit again, signifying that additional descriptors have
been placed into the receive descriptor ring.
The RDAR register is cleared at reset and when ECR[ETHER_EN] transitions from set
to cleared or when ECR[RESET] is set.
Address: ENET_RDAR is 400C_0000h base + 10h offset = 400C_0010h
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
0
0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ENET_RDAR field descriptions
Field
31–25
Reserved
Description
This read-only field is reserved and always has the value zero.
Table continues on the next page...
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1141