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18. Serial Bus Interface (SBI)
18.5 Data Transfer of I2C Bus
TMP89FM42
RA001
Figure 18-18 Example when SBI0CR1<BC>="000" and SBI0CR1<ACK>="1"
(2)
When SBI0SR2<TRX> is "0" (Receiver mode)
When the data to be transmitted subsequently is other than 8 bits, set SBI0CR1<BC> again. Set
SBI0CR1< ACK> to "1" and read the received data from the SBI0DBR (Reading data is undefined
immediately after a slave address is sent).
After the data is read, SBI0CR2<PIN> becomes "1" by writing the dummy data (0x00) to the
SBI0DBR. The serial bus interface circuit outputs a serial clock pulse to the SCL0 pin to transfer the
subsequent 1-word data and sets the SDA0 pin to "0" at the acknowledge signal timing.
An interrupt request occurs and SBI0CR2<PIN> becomes "0". Then a serial bus interface circuit
outputs a clock pulse for 1-word data transfer and the acknowledge signal by writing data to the
SBI0DBR or setting SBI0CR2<PIN> to "1" after reading the received data.
Figure 18-19 Example when SBI0CR1<BC>="000" and SBI0CR1<ACK>="1"
To make the transmitter terminate transmission, execute following procedure before receiving a
last data.
1. Read the received data.
2. Clear SBI0CR1<ACK> to "0" and set SBI0CR1<BC> to "000".
3. To set SBI0CR2<PIN> to "1", write a dummy data (0x00) to SBI0DBR.
Transfer 1-word data in which no clock is generated for an acknowledge signal by setting
SBI0CR2<PIN> to "1". Next, execute following procedure.
1. Read the received data.
2
3
4
5
6
7
8
9
1
Acknowledge signal
from the receiver
D7
D6
D5
D4
D3
D2
D1
D0
SCL0 pin
SDA0 pin
INTSBI0 Interrupt request
SBI0CR2<PIN>
Write to SBI0DBR
Acknowledge signal
to the transmitter
2
3
4
5
6
7
8
9
9
1
D7
New D7
D5
D6
D4
D3
D2
D1
D0
Read SBI0DBR
Write to SBI0DBR
SDA0 pin
SCL0 pin
SBI0CR2<PIN>
INTSBI0 Interrupt
request
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......