At75c320 pin description – Rainbow Electronics AT75C320 User Manual
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AT75C320
1769A–07/01
AT75C320 Pin Description
Table 2. AT75C320 Pin Description
Block
PQFP Pin Name
Type
Function
Common Bus
A[21:0]
O
Address Bus
D[15:0]
I/O
Data Bus
NREQ
I
Bus Request
NGNT
O
Bus Grant
Synchronous
Dynamic Memory
Controller
DCK
O
SDRAM Clock
DQM[1:0]
O
Memory Data Byte Masks
CS0
O
SDRAM Chip Select
CS1
O
SDRAM Chip Select
WE
O
SDRAM Write Enable
RAS
O
Row Address Select
CAS
O
Column Address Select
Static Memory
Controller
NCE0, NCE3
O
Chip Selects
NWE[1:0]
O
Byte Select/Write
NSOE
O
Enable Output
NWR
O
Enable Memory Block Write
NWAIT
I
Enable Enable Wait States
I/O Port A
PA[12:0], PA19
I/O
General Purpose I/O Lines. Multiplexed with Peripheral I/Os
I/O Port B
PB[9:0]
I/O
General Purpose I/O Lines. Multiplexed with Peripheral I/Os
DSP Subsystem A
OakAIN[1:0]
I
OakDSPCore A User Inputs
OakAOUT[1:0]
O
OakDSPCore A User Outputs
DSP Subsystem B
OakBIN[1:0]
I
OakDSPCore B User Inputs
OakBOUT[1:0]
O
OakDSPCore B User Outputs
Timer/Counter 0
TCLK0
I
Timer 0 External Clock
TIOA0
I/O
Timer 0 Signal A
TIOB0
I/O
Timer 0 Signal B
Timer/Counter 1
TCLK1
I
Timer 1 External Clock
TIOA1
I/O
Timer 1 Signal A
TIOB1
I/O
Timer 1 Signal B
Watchdog
NWDOVF
O
Watchdog Overflow
Serial Peripheral
Interface
MISO
I/O
Master In/Slave Out
MOSI
I/O
Master Out/Slave In
SPCK
I/O
Serial Clock
NPCSS
I/O
Chip Select/Slave Select