tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 310
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tmp89fm42a
Manufacturer Part Number
tmp89fm42a
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42A.pdf
(431 pages)
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Part Number:
tmp89fm42aUG
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RA002
Example :Generate the start condition
18.5.3
SCL0 pin
SDA0 pin
SBI0CR1<PIN>
Interrupt request
signal
SBI0CR2<TRX>
18.5.3.1
CHK_BB:
whether the mode is a master or slave.
Check SBI0SR2<MST> by the interrupt process after a 1-word data transfer is completed, and determine
1-word data transfer
Figure 18-17 Generating the Start Condition and the Slave Address
(1)
Check SBI0SR2<TRX> and determine whether the mode is a transmitter or receiver.
When SBI0SR2<MST> is "1" (Master mode)
the process to generate a stop condition (described later) and terminate data transfer.
subsequently is other than 8 bits, set SBI0CR1<BC> again, set SBI0CR1<ACK> to "1", and write the
transmitted data to SBI0DBR.
the subsequent 1-word data from the SCL0 pin, and then the 1-word data is transmitted from the SDA0
pin.
pin is set to the low level. If the data to be transferred is more than one word in length, repeat the
procedure from the SBI0SR2<LRB> checking above.
Check SBI0SR2<LRB>. When SBI0SR2<LRB> is "1", a receiver does not request data. Implement
When SBI0SR2<LRB> is "0", the receiver requests subsequent data. When the data to be transmitted
After writing the data, SBI0CR2<PIN> becomes "1", a serial clock pulse is generated for transferring
After the data is transmitted, an interrupt request occurs. SBI0CR2<PIN> become "0" and the SCL0
When SBI0SR2<TRX> is "1" (Transmitter mode)
TEST
JR
LD
LD
Start condition
1
(SBI0SR2).BB
F, CHK_BB
(SBI0DBR), 0xcb
(SBI0CR2), 0xf8
2
3
Slave address + Direction bit
Page 291
4
; Confirms that the bus is free
; The transmission slave address 0x65 and the direction bit "1"
; Write "1" to SBI0CR2<MST>, <TRX>, <BB> and <PIN> to "1"
5
6
7
SBI0CR2 <TRX> is cleared to "0"
when the direction bit is "1"and an
acknowledge signal is returned.
8
9
TMP89FM42A
Acknowledgem
ent signal from
a slave
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