21
J.A.G Aug 2006
►
7-bit Mode Control Register
(MCR)
z
The first 4 bits in a high state causes the IC to automatically adjust the
carrier frequency to the transponder resonant frequency
z
Other combinations allow individual frequency selection by using the
division factors 114 ~ 124 (default is 119)
Bit 0
Start Bit
0
Start bit is always LOW
Bit 1
Frequency selection/ Threshold adjust
Bit 2
Frequency selection/ Threshold adjust
Bit 3
Frequency selection/ Threshold adjust
Bit 4
Frequency selection/ Threshold adjust
Bit 5
SCI_Sync
0 (default)
Asynchronous data transmission
1
Synchronous data transmission
Bit 6
RX_AFC
0 (default)
Automatic demodulator threshold adjustment
1
Demodulator threshold defined by bits 1~4
Bit 7
Test_Bit
0 (default)
No further bytes.
1
Further bytes follow (Special test modes)
