Toshiba – Toshiba TMP87CP24AF User Manual
Page 83
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TOSHIBA
TMP87CM24A/P24A
SI01, SI02 Control Registers 1
7
6
5
4
SI01CR1
(0020
h
)
SI02CR1
(0022
h
)
SIOS
SIO
INH
,SIOM ,
____ ________
(Initial value :
0000 0000)
SIOS
Indicate transfer start/stop
0 : Stop
1 : Start
SIOINH
Conti nue/abort transfer
0 : Continue transfer
1 : Abort transfer (automatically cleared after abort)
SIOM
Transfer mode select
000 : 8-bit transmit mode
010 : 4-bit transmit mode
100 : 8-bit transmit/receive mode
101 : 8-bit receive mode
110: 4-bit receive mode
SCK
Serial clock select
000 : Internal clock fc/2’^ or fs/2= [Hz]
001 : Internal clock fc/2® L /Output on\
010 : Internal clock fc/2® j \SCKpin /
011 : Internal clock fc/2^
111 : External clock (input from SCK pin)
Write
only
Note 1
Note 2
Note3
fc: High-frequency clock [Hz], fs: Low-frequency clock [Hz]
Set SIOS to "0" and SIOINH to "1" when setting the transfer mode or serial clock.
SI01CR/SI02CR1
are
write-only
registers
and
must
not
be
used
with
any
of
read-modify-write
instructions such as bit operate, etc.
SI01, SI02 Status Registers
SI01SR
(0020
h
)
SI02SR
(0022
h
)
7
6
5
4
3
2
1
0
SlOF
SEF
"1"
"1"
"1"
"1"
"1"
"1" ;
SlOF
Serial transfer operating
status monitor
0 : Transfer terminated
(
After SIOS is cleared to "0",SIOFis\
. _ X ■
1
cleared to "0" atthe termination
1
1 : Transfer in process \
of transfer orsettlnq of
sioinh
.
/
SEF
Shift operating status
monitor
0 : Shift operation terminated
1 : Shift operation in process
SI01, SI02 Control Registers 2
SI01CR2 7
6
5
4
(0021
h
)
SI02CR2
(0023
h
)
WAIT
____ I____
BUF
J________ L
(Initial value:
***0 0000)
Read
only
WAIT
Wait control
Always sets "00" except 8-bit transmit/receive mode.
00 : Tf =T
d
(non-wait)
01 : Tf
=2T
d
-I
10:Tf=4To (wait)
11 : Tf = 8T
d
-1
Buffer address used
SI01
SI02
000 : 1 word transfer
OFFO
h
0FF8
h
001 : 2 words transfer
OFFO toOFFlH
0FF8 toOFF9n
BUF
Number of transfer words
010 : 3 words transfer
OFFO toOFF2H
0FF8 toOFFAn
011 : 4 words transfer
OFFO toOFF3H
0FF8 toOFFBn
100 : 5 words transfer
OFFO to0FF4H
0FF8 toOFFCn
101 : 6 words transfer
OFFO toOFFSH
0FF8 toOFFDn
110:7 words transfer
OFFO toOFF6H
0FF8 toOFFEn
111:8 words transfer
OFFO toOFF7H
0FF8 toOFFFn
Write
only
3
-
24-83
2002
-
10-03