atr2434 ATMEL Corporation, atr2434 Datasheet - Page 8

• Manufacturer Part Number: atr2434
• Description: Wirelessusb 2.4-ghz Dsss Radio Soc - Atmel Corporation
• Manufacturer: ATMEL Corporation

Figure 6. SPI Burst Write Sequence
DIO Interface
Figure 7. DIO Receive Sequence
Figure 8. DIO Transmit Sequence
8
DIOVAL
M O S I
M IS O
DIOVAL
S C K
ATR2434 [Preliminary]
S S
IRQ
DIO
IRQ
DIO
cm d
D IR
1
v0
d0
IN C
1
v0
d0
v1
d1
A 5
d1
v1
v2
d2
The DIO communications interface is an optional SERDES bypass data-only transfer
interface. In receive mode, DIO and DIOVAL are valid after the falling edge of IRQ,
which clocks the data as shown in Figure 7. In transmit mode, DIO and DIOVAL are
sampled on the falling edge of the IRQ, which clocks the data as shown in Figure 8. The
application MCU samples the DIO and DIOVAL on the rising edge of IRQ.
A 4
d2
v2
v3
d3
a d dr
d3
A 3
v3
v4
d4
d4
v4
A 2
v5
d5
d5
data to mcu
v5
A 1
data from mcu
v6
d6
v6
d6
A 0
v7
d7
v7
d7
D 7
d8
v8
d8
v8
da ta from m cu
D 6
v9
d9
d9
v9
D 5
d10
v10
d10
v10
D 4
v11
d11
d11
v11
v12
d12
D 3
d12
v12
v13
d13
D 2
d13
v13
v14
d14
D 1
1
d14
v14
v...
d...
D 0
v...
d...
D 7
d a ta fro m m cu
D 6
D 5
D 4
D 3
D 2
1 +N
D 1
D 0
4822C–ISM–09/04