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TMP93CS44 датащи(PDF) 151 Page - Toshiba Semiconductor

номер детали TMP93CS44
подробное описание детали  CMOS 16-Bit Microcontroller
PDF  224 Pages
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производитель  TOSHIBA [Toshiba Semiconductor]
домашняя страница  http://www.semicon.toshiba.co.jp/eng
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TMP93CS44 датащи(HTML) 151 Page - Toshiba Semiconductor

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TMP93CS44/S45
2004-02-10
93CS44-149
3.10.4
I
2C Bus Mode Control
The following registers are used for control and operation status monitoring when using
the serial bus interface (SBI) in the I2C bus mode.
Serial Bus Interface Control Register 1
7
6
5
4
3
2
1
0
Bit symbol
BC2
BC1
BC0
ACK
SCK2
SCK1
SCK0
SBICR1
(004BH)
Read/Write
W
R/W
W
After reset
0
0
0
0
0
0
0
Prohibit
read-modify-
write
Function
Number of transferred bits
(Note 1)
Acknowledge
mode
specification
Serial clock selection
(Note 2)
Note 1:
Set <BC2:0> to “000” before switching to a clock synchronous 8-bit SIO mode.
Note 2:
Refer to sentence of 3.10.4 (3) “Serial clock”.
Note 3:
This I
2C bus circuit does not support high-speed mode. It supports standard mode only.
Figure 3.10.3 Register for I
2C Bus Mode (1/4)
Serial clock selection
000
N
= 4
−
kHz
001
N
= 5
−
kHz
010
N
= 6
−
kHz
011
N
= 7
74.6 kHz
100
N
= 8
38.2 kHz
101
N
= 9
19.3 kHz
110
N
= 10
9.71 kHz
System clock: fc
Clock gear: fc/1
fc
= 20 MHz
(Output on SCL pin)
111
(Reserved)
Acknowledge mode specification
0
Not generate clock pulse for acknowledge signal
1
Generate clock pulse for acknowledge signal
Number of transferred bits
<ACK>
= 0
<ACK>
= 1
<BC2:0> Number of
Clock
Bits
Number of
Clock
Bits
000
8
8
9
8
001
1
1
2
1
010
2
2
3
2
011
3
3
4
3
100
4
4
5
4
101
5
5
6
5
110
6
6
7
6
111
7
7
8
7



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