
Micrel, Inc.
KSZ8864RMN
April 2012
12
M9999-043012-1.5
Pin Description (Continued)
Pin Number
Pin Name
Type
(1)
Port
Pin Function
(2)
40
SM4RXDV/SM4CRSDV
IPD/O
4
SM4RXDV: MAC4 Switch SW4-MII receive data valid.
SM4CRSDV: MAC4 Switch SW4-RMII Carrier Sense/Receive Data
Valid
41
SM4RXD3
IPD/O
4
MAC4 Switch MII receive bit 3.
Strap option:
PD (default) = Disable Switch MII/RMII full-duplex flow control;
PU = Enable Switch MII/RMII full-duplex flow control.
42
SM4RXD2
IPD/O
4
MAC4 Switch MII receive bit 2.
Strap option:
PD (default) = Switch MII/RMII in full-duplex mode;
PU = Switch MII/RMII in half-duplex mode.
43
SM4RXD1
IPD/O
4
MAC4 Switch MII/RMII receive bit 1.
Strap option:
PD (default) =MAC4 Switch SW4-MII/RMII in 100Mbps mode;
PU = MAC4 Switch SW-5MII/RMII in 10Mbps mode.
MAC4 Switch MII/RMII receive bit 0.
Strap option: LED mode
PD (default) = mode 0;
PU = Mode 1.
See “Register 11.”
Mode 0
Mode 1
PxLED1
Lnk/Act
100Lnk/Act
44
SM4RXD0
IPD/O
4
PxLED0
Speed
Full duplex
45
SM4COL
IPD/O
4
MAC4 Switch MII collision detect:
Input: SW4-MII MAC modes.
Output: SW4-MII PHY modes.
46
SM4CRS
IPD/O
4
MAC4 Switch MII modes carrier sense:
Input: SW4-MII MAC modes.
Output: SW4-MII PHY modes.