atsam3303b ATMEL Corporation, atsam3303b Datasheet - Page 16

• Manufacturer Part Number: atsam3303b
• Description: Atsam3303b Audio Processing
• Manufacturer: ATMEL Corporation

10.1.2
Status register is read when A0 = 1, RD = 0, CS = 0.
If 0, data from ATSAM3303B to host is pending and IRQ is high. Reading the data at A0 = 0 will set TE to 1 and clear IRQ.
If 0, then ATSAM3303B is ready to accept DATA from host.
10.2
10.3
16
TE
7
SmartMedia and Other Peripheral Interfaces
EEPROM/DataFlash Interface
ATSAM3303B
IO Status Register
RF
6
Table 10-1.
• TE: Transmit empty
• RF: Receiver full
Note:
This is a master 8-bit parallel interface that provides connection to SmartMedia or other periph-
erals such as LCD screens.
Pins used: I/O7 - I/O0 (I/O), SMPD (input), SMCE, SMALE, SMCLE, SMRE, SMWE (outputs)
All these pins are fully under firmware control, therefore timing compatibility is ensured by firm-
ware only.
This is a master synchronous serial interface, operating in SPI mode 0.
Pins used: DFCS, DFSI, DFSCK (outputs), DFSO (input)
The DFSCK frequency is firmware programmable from fck to fck/64, where fck is the crystal fre-
quency. Thus a large variety of EEPROM/DataFlash devices can be accomodated.
Please refer to Atmel DataFlash datasheets for accurate SPI mode 0 timing.
Figure 10-3. Typical DataFlash Interface Timing
Symbol
t
t
t
PWR
DWS
DWH
If status bit RF is not checked by host, write cycle time should not be lower than 3 µs.
X
5
Parameter
WR pulse width
Write data setup time
Write data hold time
Timing Parameters (Continued)
DFSCK
DFSI
DFSO
X
4
3
X
Min
50
10
0
LSB
MSB
X
2
Typ
-
-
-
Max
-
-
-
1
X
6091D–DRMSD–12-Feb-07
Unit
ns
ns
ns
X
0