AT7908E
Operations 5 and 6
Table 39. write reg 03 H, data =0AHex
(SETUP_3 register) Resynchronisation jump length = 2 system clock and transmission request.
SETUP_3
SETUP_3
RxClr
0
Reset
0
IntClr
0
AbortTx
0
Txreq
0
RSJ2
0
RSJ1
1
RSJ0
0
RxClr
0
Reset
0
IntClr
0
AbortTx
0
Txreq
0
RSJ2
0
RSJ1
1
RSJ0
0
After this setting, the AT7908E waits for a remote frame request and the STATUS regis-
ter will be not updated.
If the request arrives, the AT7908E will send an acknowledge and then starts to transmit
the data frame in reply to the remote frame request. The STATUS register, during the
answer, will be automatically updated (TX_active bit become 1).
STATUS
STATUS
SyncTx
0
SyncRx
0
Rxbuf1
0
Rxbuf0
0
TxOK
0
TxActive
0
ErrPass
0
BusOff
0
SyncTx
0
SyncRx
0
Rxbuf1
0
Rxbuf0
0
TxOK
0
TxActive
1
ErrPass
0
BusOff
0
At the end of the transmission, the AT7908E will send the INT to the MCU that can read
out the STATUS register to check that all is OK.
Setting to send remote frame request
In this paragraph will be described the procedure to send a remote frame request.
After the Device configuration, the MCU must initialize the transmit buffer to send the
remote frame request and the receiver buffers to receive the remote frame answer.
The configuration of all the setup registers after RESET signal.
Operation 1
Table 40. write reg 00 H, data =02Hex
(SETUP_0 register) system clock = external clock, enable receiving completed interrupt
Gensync
Tx
Gensync
Rx
SETUP_0
BPR1
0
BPR0
0
Errint
0
Overint
0
Rxint
0
Txint
0
0
0
42
4268D–AERO–11/09