at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 149

• Manufacturer Part Number: at91sam9260-cj
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Table 20-6.
20.6.6.3
6221G–ATARM–31-Jan-08
Mode
Attribute Memory
Common Memory
I/O Mode
True IDE Mode
Alternate True IDE Mode
Standby Mode or
Address Space is not
assigned to CF
Alternate Status Read
Control Register
Drive Address
Data Register
Read/Write Signals
Task File
CFCE1 and CFCE2 Truth Table
The CFCE1 and CFCE2 waveforms are identical to the corresponding NCSx waveform. For
details on these waveforms and timings, refer to the Static Memory Controller section.
In I/O mode and True IDE mode, the CompactFlash logic drives the read and write command
signals of the SMC on CFIOR and CFIOW signals, while the CFOE and CFWE signals are deac-
tivated. Likewise, in common memory mode and attribute memory mode, the SMC signals are
driven on the CFOE and CFWE signals, while the CFIOR and CFIOW are deactivated.
20-4 on page 150
Attribute memory mode, common memory mode and I/O mode are supported by setting the
address setup and hold time on the NCS4 (and/or NCS5) chip select to the appropriate values.
CFCE2
NBS1
NBS1
NBS1
1
1
1
1
0
0
1
CFCE1
demonstrates a schematic representation of this logic.
NBS0
NBS0
NBS0
0
0
0
0
1
1
1
16 bits
16 bits
16 bits
16bits
DBW
8 bits
8 bits
8 bits
8 bits
Don’t
Care
–
Access to Even Byte on D[7:0]
Access to Odd Byte on D[15:8]
Access to Even Byte on D[7:0]
Access to Odd Byte on D[15:8]
Access to Even Byte on D[7:0]
Access to Odd Byte on D[7:0]
Access to Even Byte on D[7:0]
Access to Odd Byte on D[15:8]
Access to Even Byte on D[7:0]
Comment
Access to Even Byte on D[7:0]
Access to Odd Byte on D[7:0]
Access to Odd Byte on D[7:0]
Access to Odd Byte on D[7:0]
–
AT91SAM9260
SMC Access Mode
Byte Select
Byte Select
Byte Select
Byte Select
Don’t Care
–
Figure
149