tmp86fp24 TOSHIBA Semiconductor CORPORATION, tmp86fp24 Datasheet - Page 133

• Manufacturer Part Number: tmp86fp24
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.14.3
Configuration
(1) Serial clock
(2) External clock
a. Clock source
Note: Do not make such a setting that the serial clock rate will exceed 1 Mbps.
supplied to the
serial clock pulse must be at least 4/fc. If fc 4 MHz, therefore, the maximum available
transfer rate is 488.28 Kbits/s.
1.
One of the following clocks can be selected using SIO1CR1<SCK>.
Setting SIO1CR1<SCK> to “111” causes an external clock to be selected. A clock
For a shift operation to be performed securely, both the high and low levels of the
Internal clock
used as the serial clock. The
ends.
SCK1
A clock having the frequency selected with SIO1CR1<SCK> (except for “111”) is
SIO1CR1<SCK>
pin input
Table 2.14.2 Serial Clock Rate (fc
000
001
010
011
100
101
110
111
SCK1
Figure 2.14.4 External Clock
pin is used as the serial clock.
T
T
SCKL
86FP24-131
SCKL
External
, T
Clock
fc/2
fc/2
fc/2
fc/2
fc/2
fc/2
fc/2
T
SCKH
SCKH
SCK1
13
8
6
5
4
3
2
t 4/fc
pin output goes high when transfer starts or
(1 Kbit
122.07 Kbps
244.14 Kbps
488.28 Kbps
976.56 Kbps
Baud Rate
15.25 Kbps
61.04 Kbps
4 MHz)
0.47 Kbps
External
1,024 bits)
TMP86FP24
2007-08-24