User guide

59
ATA5811/ATA5812 [Preliminary]
4689B–RKE–04/04
Figure 50. TX Operation (T_MODE = 0)
N
Write Control Register 6
Baud1, Baud0: Select Baudrate Range
Lim_max0 ... Lim_max5: Don't care
Write Control Register 5
Lim_min0 ... Lim_min5: Select the baud rate
Bitchk0, Bitchk1: Don't care
Write Control Register 4
XLim: Select the baud rate
ASK/_NFSK: Select modulation
Sleep0 ... Sleep4: Don't care
XSleep: Don't care
Write Control Register 3
FR7, FR8:
VSOUT_EN: Set VSOUT_EN = 1
CLK_ON: Don't care
Write Control Register 2
FR0 ...FR6: Adjust f
RF
P_mode: Enable or disable the
Manchester modulator
Write Control Register 1
IR1, IR0: Select an event which activates
an interrupt
AVCC_EN: Don't care
FS: Select operating frequency
OPM1, OPM0: Set OPM1 = 0 and OPM0 = 1
T_mode: Set T_mode = 0
Write TX/RX Data Buffer (max. 16 byte)
Pin IRQ = 1 ?
Y
N
TX more Data
Bytes ?
Y
Write TX/RX Data Buffer (max. 16 - number of bytes still in
the TX/RX Data Buffer)
Command: Delete_IRQ
N
Pin IRQ = 1 ?
Y
Write Control Register 1
OPM1, OPM0: Set IDLE
Idle Mode
Start-up
Mode (TX)
T
Startup
= 331,5 × T
DCLK
TX Mode
Idle Mode
Adjust f
RF