Datasheet

W5500 Datasheet Version1.0 (August 2013) 37 / 65
SIR (Socket Interrupt Register) [R/W] [0x0017] [0x00]
SIR indicates the interrupt status of Socket. Each bit of SIR be still „1‟ until Sn_IR is
cleared by the host. If Sn_IR is not equal to „0x00‟, the n-th bit of SIR is „1‟ and INTn
PIN is asserted until SIR is „0x00‟.
7
6
5
4
3
2
1
0
S7_INT
S6_INT
S5_INT
S4_INT
S3_INT
S2_INT
S1_INT
S0_INT
Bit
Symbol
Description
7
~
0
Sn_INT
When the interrupt of Socket n occurs, the n-th bit of SIR becomes
„1‟.
SIMR (Socket Interrupt Mask Register) [R/W] [0x0018] [0x00]
Each bit of SIMR corresponds to each bit of SIR. When a bit of SIMR is „1‟ and the
corresponding bit of SIR is „1‟, Interrupt will be issued. In other words, if a bit of
SIMR is „0‟, an interrupt will be not issued even if the corresponding bit of SIR is „1‟.
7
6
5
4
3
2
1
0
S7_IMR
S6_IMR
S5_IMR
S4_IMR
S3_IMR
S2_IMR
S1_IMR
S0_IMR
Bit
Symbol
Description
7
~
0
Sn_IMR
Socket n(Sn_INT) Interrupt Mask
0: Disable Socket n Interrupt
1: Enable Socket n Interrupt