www.geehy.com Page 36
SMC signal name
Signal direction
Function
NEW
Output
Write enable signal
NWAIT/INT[3:2]
Input
NAND Flash ready/busy input signal
A[17]
Output
NAND Flash address latch signal (ALE)
A[16]
Output
NAND Flash command latch signal
(CLE)
D[15:0]
Input/Output
8-bit multiplexing: D[7:0] bidirectional
address/data bus
Input/Output
16-bit multiplexing: D[15:0] bidirectional
address/data bus
Table 24 PC Card Interface Signal
SMC signal name
Signal direction
Function
NCE4_1
Output
Chip selection signal 1
NCE4_2
Output
Chip selection signal 2 (select 16-bit or
8-bit operation)
NOE
Output
Read enable signal
NEW
Output
Write enable signal
NWAIT
Input
PC card wait signal
INTR
Input
PC card interrupt signal
CD
Input
PC card detection signal
A[10:0]
Output
Address bus
NIOS16
Input
Data transmission width of 16-bit
transmission I/O space (must be
grounded)
NIORD
Output
I/O space output enable
NIOWR
Output
I/O space write enable
NREG
Output
Selection of common space or attribute
space access
D[15:0]
Output/Input
Bidirectional data bus
NAND Flash/PC card controller provides programmable timing parameters for
external memory, including the parameters in the following table:
