tmp19a43fzxbg TOSHIBA Semiconductor CORPORATION, tmp19a43fzxbg Datasheet - Page 291

• Manufacturer Part Number: tmp19a43fzxbg
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

SCL Line
SDA Line
Start Condition
(6) Selecting a transmitter or receiver
(7) Generating a start/stop condition
SBI0CR2<TRX> to 0 causes the device to operate as a receiver.
•
•
•
to 0 when the direction bit is 0.
hardware if the transmitted direction bit is 1 or changes to 1 if the transmitted direction bit is 0. When
no acknowledgement is returned, TRX remains unchanged.
cleared to 0 by hardware.
and 8-bit data to appear on the bus. Ensure that SBI0CR1<ACK> has been set to 1 beforehand.
stop condition output sequence on the bus. Do not change the contents of SBI0CR2<MST, TRX, BB,
PIN> until a stop condition has been generated on the bus.
state) upon the detection of a start condition on the bus or reset to 0 (bus free state) upon the detection
of a stop condition.
Setting SBI0CR2<TRX> to 1 causes the device to operate as a transmitter. Setting
In slave mode,
TRX is set to 1 by hardware when the direction bit (
In master mode, when acknowledgement is returned from a slave device, TRX changes to 0 by
If a stop condition or arbitration lost is detected on the bus, SBI0CR2<TRX> is automatically
When SBI0SR<BB> = 0, writing 1s to SBI0CR2<MST, TRX, BB, PIN> causes a start condition
When BB = 1, writing 1s to SBI0CR2<MST, TRX, PIN> and a 0 to SBI0CR2<BB> initiates a
The bus status can be determined by reading SBI0SR<BB>. SBI0SR<BB> is set to 1 (bus busy
Figure 3.12.8 Generating a Start Condition and Slave Address
when transferring data in addressing format
when the received slave address is the same as the value set in I2C0AR
when a general call (all 8 bits of data after a start condition are 0) is received
Figure 3.12.9 Generating a Stop Condition
A6
SCL Line
SDA Line
1
A5
TMP1942CY/CZ-290
2
A4
Slave address and direction bit
3
A3
4
Stop Condition
A2
5
R
/
W
) sent from the master device is 1 or set
A1
6
TMP1942CY/CZ
A0
7
R/W
8
Acknowledge signal
9