ACD82224 Datasheet, PDF (19/77 Pages) List of Unclassifed Manufacturers – 24 Ports 10/100 Fast Ethernet Switch

6. INTERFACE DESCRIPTION
Figure-6.1 shows all the interfaces of the ACD82224 controller and their relations to other
modules in a typical switch system. Table-6.1 list all function pins grouped by types.
Figure-6.1 Major Interface Group
* a=8 for 82216
0 for 82224
RMII
PHY
LED
Logic
P(a) RMII
P(a+1) RMII
P23 RMII
RMIICLK[0:5]
LED[0:3]
LEDCLK
LEDVLD[0:1]
System
Logic
CLK100
nRESET
WCHDOG
TESTEN
SYSERR
ADDR[0:18]
nWE
nCS
DATA[0:47]
BE[0:2]
EOF
ACD822xx
SWDIR[0:1]
SWSYNC
SWSTAT[0:3]
ARLDI[0:3]
ARLDIV
SWRXCLK
SWTXCLK
P23 RMII
TM
ZBT
SRAM
ACD80800
Optional
ACD80900
Optional
Table-6.1 Interface Group
Interface
Pin Name
RMII Port[0:22] PxCRS_DV, PxRXD0, PxRXD1, PxTXEN, PxTXD0, and PxTXD1
MII Port-23
P23CRS*, P23RXDV*, P23RXCLK, P23RXERR, P23RXD0*,
P23RXD1*, P23RXD2, P23RXD3, P23COL,P23TXEN, P23TXD0*,
P23TXD1*, P23TXD2, P23TXD3, and P23TXCLK
(*: shared with RMII signals in Port23)
RMII Clock
RMIICLK[5:0]
PHY Management MDC, and MDIO
Memory Address ADDR[0:18]
Memory Data DATA[47:0], BE[2:0], and EOF
Memory Control nWE, and nCS
ARL and MIB
SWDIR[1:0], SWPID[4:0], SWSYNC, SWSTAT[4:0], SWRXCLK,
SWTXCLK, ARLDI[3:0], and ARLDIV
LED
CPU
System Control
LEDVLD[1:0], LEDCLK, and nLED[3:0]
CPUDI, CPUDO, and CPUIRQ
CLK100, nRESET, WCHDOG, and SYSERROR
Factory Test
2.5V
3.3V
Ground
EN16P, CLKSEL, TESTEN, and ZBTCLK
VDD (for Core)
VDDQ (for I/O)
VSS (including 36 center thermal ground)
Total Number of pins
82224
138
15
6
2
19
52
2
19
7
3
4
4
17
33
67
388
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