at75c220 ATMEL Corporation, at75c220 Datasheet - Page 3

• Manufacturer Part Number: at75c220
• Description: Smart Internet Appliance Processor Siap
• Manufacturer: ATMEL Corporation

Pin Description
Table 1. AT75C220 Pin Description List
Block
Common Bus
Synchronous Dynamic
Memory Controller
Static Memory Controller
I/O Port A
I/O Port B
DSP Subsystem
Timer/Counter 0
Timer/Counter 1
Watchdog
Pin Name
A[21:0]
D[15:0]
NREQ
NGNT
DCLK
DQM[1:0]
CS0
CS1
RAS
CAS
WE
NCE0, NCE3
NWE[1:0]
NSOE
NWR
NWAIT
PA[12:0]
PA[19]
PB[9:0]
OAKAIN[1:0]
OAKAOUT[1:0]
TCLK0
TIOA0
TIOB0
TCLK1
TIOA1
TIOB1
NWDOVF
Function
Address Bus
Data Bus
Bus Request
Bus Grant
SDRAM Clock
SDRAM Byte Masks
SDRAM Chip Select 0
SDRAM Chip Select 1
Row Address Strobes
Column Address Strobes
SDRAM Write Enable
Chip Selects
Byte Select/Write Enable
Output Enable
Memory Block Write Enable
Enable Wait States
General-purpose I/O lines. Multiplexed with
peripheral I/Os.
General-purpose I/O line. Multiplexed with
peripheral I/Os.
General-purpose I/O lines. Multiplexed with
peripheral I/Os.
OakDSPCore User Input
OakDSPCore User Output
Timer 0 External Clock
Timer 0 Signal A
Timer 0 Signal B
Timer 1 External Clock
Timer 1 Signal A
Timer 1 Signal B
Watchdog Overflow
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Type
Input
Input
Input
Input
Input
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