M38197 Mitsubishi, M38197 Datasheet - Page 28

• Manufacturer Part Number: M38197
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

(2.3) When Selecting the Internal Clock
When selecting the internal clock, the P6
can be used as the S
When selecting the internal clock, the P6
synchronous clock output pin S
this case, the S
Select the function of the P6
with the following registers (refer to Table GA-1):
Fig. GA-8 Timing diagram during serial I/O automatic transfer (internal clock selected, S
Fig. GA-9 Timing during serial I/O automatic transfer (internal clock selected, S
28
the bit 3 (SC1
rial I/O1 control register
the bit 3 (SIOAC
register
Bit 1 write signal of serial I/O
automatic transfer control
register
Write signal from RAM to
serial I/O1 register
Write signal from serial I/O1
register to RAM
Bit 3 of serial I/O automatic
transfer control register
Bit 1 of serial I/O automatic
transfer control register
Bit 1 write signal of serial I/O
automatic transfer control
register
Bit 1 of serial I/O automatic
Write signal from RAM to
Write signal from serial I/O1
serial I/O1 register
transfer control register
register to RAM
CLK11
3
), the bit 4(SC1
(internal or S
3
Serial I/O output
) of the serial I/O automatic transfer control
RDY1
Serial I/O input
pin goes to high impedance state.
Transfer clock
S
S
Data pointer
CLK11
CLK12
Serial I/O output
Serial I/O input
Transfer clock
(internal)
enabled signal
pin by setting SC1
Data pointer
output
output
CLK
7
/S
S
S
Receive
CLK12
out
IN
RDY1
output)
4
), and the bit 6(SC1
S
S
RDY
S
out
IN
/CS/S
by setting SIOAC
m
7
7
pin can be used as the
DO
/S
CLK12
DI
4
n
0
0
RDY1
to “1”.
DO
DI
1
1
and P6
DO
/CS/S
DI
DO
DI
2
0
2
0
6
DO
DI
DO
) of the se-
DI
3
3
CLK12
3
1
6
to “1”. In
1
DO
/S
DI
DO
DI
4
4
CLK11
2
DO
2
DI
pin
5
DO
5
DI
DO
DI
3
3
6
6
DO
DI
DO
DI
7
4
Transfer interval
4
7
When using both the S
P6
tion register to input mode. Note that switch SIOAC
transfer clock at the completion of automatic transfer.
Table GA-1. S
Note : SC1
DO
DI
5
7
SC1
5
/S
DO
1
DI
RDY1
SC1
SC1
SIOAC
6
6
CLK11
m-1
6
DO
DI
3
4
6
/CS/S
: Serial I/O1 port selection bit
: S
: Synchronous clock selection bit
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
DO
7
DI
7
3
Transfer interval
0
: Synchronous clock output pin selection bit
0
and S
RDY1
SC1
CLK11
0
RDY
CLK12
output selection bit
0
4
DO
DI
CLK12
used)
6
6
and S
MITSUBISHI MICROCOMPUTERS
DO
DI
n-1
to the P6
CLK11
7
7
SC3
used)
DO
DI
1
CLK12
0
0
3
and S
7
(SC1
selection
SIOAC
DO
DI
n
CKL12
0
6
0
1
6
4
DO
=0) and set the P6
DI
DO
3
DI
3819 Group
by switching, switch the
7
7
0
0
P6
impedance
DO
DI
S
1
6
1
High
CLK11
/S
DO
DI
CLK11
2
2
3
DO
DI
3
during “H” of
3
P6
S
7
7
CLK12
/S
P6
direc-
CLK12
7