SC220 ZARLINK [Zarlink Semiconductor Inc], SC220 Datasheet - Page 4

• Manufacturer Part Number: SC220
• Description: XpressFlow 2020 Ethernet Routing Switch Chipset
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

XpressFlow-2020 Series –
Ethernet Switch Chipset
1. PIN ASSIGNMENT
1.1 Logic Symbol
Note:
© 1998 Vertex Networks, Inc.
1999
L_BWE[3:0]#
L_WE[3:0]#
P_RSTOUT
L_OE[3:0]#
P_RSTIN#
L_ADSC#
P_D[31:0]
P_A[11:1]
L_D[31:0]
L_A[18:2]
P_BS16#
P_RDY#
P_ADS#
P_RWC
The SC220 is pin compatible to the SC201 with only one exception:
The RSTOUT pin of SC201 is defined as a synchronous RESET output pin which follows the RSTIN input and re-synchronous with
The RSTOUT pin for SC220 has a totally different function. It is no longer related with the RSTIN input. The RSTOUT is a watch-
P_CS#
P_CLK
L_CLK
P_INT
P_CLK for meeting the 80386 timing requirement.
dog output from SC220 to keep track of the active state of the host processor. Host processor needs to access the Keep
Alive register periodically to prevent the setting of the RSTOUT output. The RSTOUT output can be use as Reset input to
the host processor.
P
4
4
4
R
E
L
SC220
I
M
I
Test Pin
N
A
R
8
8
Y
T_MODE
C_D[15:0]
C_CE#
C_WE#
C_CM#
C_EC#
C_MF#
C_FF#
S_D[31:0]
S_MSGEN#
S_EOF#
S_IRDY
S_TABT#
S_OVLD#
S_HPREQ#
S_REQ[8:1]#
S_GNT[8:1]#
S_CLK
I
3
N
F
O
R
M
A
T
I
XpressFlow Engine
O
N
Rev. 4.5 – February
SC220