tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 288
tmp89fm42
Manufacturer Part Number
tmp89fm42
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42.pdf
(408 pages)
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18.4 Functions
18. Serial Bus Interface (SBI)
RA001
INTSBI0 interrupt request
SBI0CR2<PIN>
SCL0 pin
18.4.8 Interrupt service request and release
18.4.9 Setting of serial bus interface mode
18.4.10Software reset
SBI0CR1<BC> and SBI0CR1<ACK> is complete, a serial bus interface interrupt request (INTSBI0) is gener-
ated.
ing conditions are satisfied:
SBI0CR2<PIN> is "0", the SCL0 pin is pulled down to the low level.
the SBI0 pin is released takes t
software.
mode, confirm serial bus interface pins in a high level, and then, write "1" to SBI0CR2<SBIM>.
the serial bus interface circuit locks up, for example, due to noise, it can be initialized by using this function.
When a serial bus interface circuit is in the master mode and transferring a number of clocks set by
In the slave mode, a serial bus interface interrupt request (INTSBI0) is generated when the above and follow-
When a serial bus interface interrupt request occurs, SBI0CR2<PIN> is cleared to "0". During the time that
Writing data to SBI0DBR sets SBI0CR2<PIN> to "1". The time from SBI0CR2<PIN> being set to "1" until
Although SBI0CR2<PIN> can be set to "1" by the software, SBI0CR2<PIN> can not be cleared to "0" by the
SBI0CR2<SBIM> is used to set serial bus interface mode.
Setting SBI0CR2<SBIM> to "1" selects the serial bus interface mode. Setting it to "0" selects the port mode.
Set SBI0CR2<SBIM> to "1" in order to set serial bus interface mode. Before setting of serial bus interface
And switch a port mode after confirming that a bus is free and set SBI0CR2<SBIM> to "0".
Note:When SBI0CR2<SBIM> is "0", no data can be written to SBI0CR2 except SBI0CR2<SBIM>. Before setting
The serial bus interface circuit has a software reset function that initializes the serial bus interface circuit. If
• At the end of the acknowledge signal when the received slave address matches to the value set by the
• At the end of the acknowledge signal when a "GENERAL CALL" is received with
• At the end of transferring or receiving after matching of the slave address or receiving of "GENERAL
values to SBI0CR2, write "1" to SBI0CR2<SBIM> to activate the serial bus interface mode.
I2C0AR<SA> with SBI0CR1<NOACK> set at "0"
SBI0CR1<NOACK> set at "0"
CALL"
1
Figure 18-11 SBI0CR2<PIN> and SCL0 Pin
2
LOW
3
.
Page 274
7
8
9
SCL0 pin is pulled
to low when
SBI0CR2<PIN> is "0"
Set SBI0CR2<PIN> to "1" or
write data to SBI0DBR
t LOW
TMP89FM42
1
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