CY7C68033_09 Datasheet, PDF (4/34 Pages) Cypress Semiconductor – EZ-USB NX2LP-Flex Flexible USB NAND Flash Controller

CY7C68033, CY7C68034
Table 1. Special Function Registers
x
8x
9x
Ax
Bx
Cx
Dx
Ex Fx
0
IOA
IOB
IOC
IOD
SCON1 PSW ACC B
1
SP
EXIF
INT2CLR
IOE
SBUF1
2
DPL0
MPAGE
INT4CLR
OEA
3
DPH0
OEB
4
DPL1
OEC
5
DPH1
OED
6
DPS
OEE
7
PCON
8
TCON
SCON0
IE
IP
T2CON EICON EIE EIP
9
TMOD
SBUF0
A
TL0
AUTOPTRH1 EP2468STAT
EP01STAT
RCAP2L
B
TL1
AUTOPTRL1 EP24FIFOFLGS
GPIFTRIG
RCAP2H
C
TH0
RESERVED EP68FIFOFLGS
TL2
D
TH1
AUTOPTRH2
GPIFSGLDATH
TH2
E
CKCON AUTOPTRL2
GPIFSGLDATLX
F
RESERVED AUTOPTRSET-UP GPIFSGLDATLNOX
Buses
The NX2LP-Flex features an 8- or 16-bit ‘FIFO’ bidirectional data bus, multiplexed on I/O ports B and D.
The default firmware image implements an 8-bit data bus in GPIF Master mode. It is recommended that additional interfaces added
to the default firmware image use this 8-bit data bus.
Enumeration
During the startup sequence, internal logic checks for the presence of NAND Flash with valid firmware. If valid firmware is found, the
NX2LP-Flex loads it and operates according to the firmware. If no NAND Flash is detected, or if no valid firmware is found, the
NX2LP-Flex uses the default values from internal ROM space for manufacturing mode operation. The two modes of operation are
described in the section Normal Operation Mode and Manufacturing Mode on page 5.
Document #: 001-04247 Rev *F
Page 4 of 34
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