AK2358F Datasheet, PDF (20/26 Pages) Asahi Kasei Microsystems – Base-band LSI for Europian Cordless Telephones(CTI, CTI+)

ASAHI KASEI
I
MSK signal transmission flow
MSK Modem
MSK signal transmission
[AK2358FI
I
W
: MSK transmission start
MSK transmission data
are transmitted
synchronized to TCLK.
: During MSK transmission
N
Transmission of the
I
TDE= “1”
I
: MSK data transmission completion
WAIT for 2 ms or more
TTXAFSW = “O”
A
: Switching to voice signal
(1) Set the serial register “TDE” to “O” and “TXAFSW” to “l”, so that lISK transmission
state is provided.
(2) A 2400Hz clock is put mt from TCLK. Synchronizing with the rising edge of TCLK,
AK2358F reads the MSK transmission data from TDATA pin and put out them 10 MOD pin.
(3) After the transrniss!on of the necessary number of signal bit, “TDE” of the serial
register is set to l“.
(4) Afterwards, before switching to a voice signal transmission mode, wait at east 2ms
after “TDE” has set to “l” to complete the MSK signal final bit transmission.
Then set TXAFSW register to “O”.
0152-E-00
“ 19
1996/12