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TMP89FM42
RA001
When the serial bus interface circuit operates in the free data format, a slave address and a direction bit are
not recognized. They are handled as data just after generating the start condition. SBI0CR2<TRX> is not
changed by the hardware.
18.4.7 Start/stop condition generation
When SBI0SR2<BB> is "0", a slave address and a direction bit which are set to the SBI0DBR are output on
a bus after generating a start condition by writing "1" to SBI0CR2 <MST>, SBI0CR2<TRX>, SBI0CR2<BB>
and SBI0CR2<PIN>. It is necessary to set SBI0CR1<ACK> to "1" before generating the start condition.
Figure 18-9 Generating the Start Condition and a Slave Address
When SBI0CR2<BB> is "1", the sequence of generating the stop condition on the bus is started by writing
"1" to SBI0CR2<MST>, SBI0CR2<TRX> and SBI0CR2<PIN> and writing "0" to SBI0CR2<BB>.
When a stop condition is generated. The SCL line on a bus is pulled down to the low level by another device,
a stop condition is generated after releasing the SCL line.
Figure 18-10 Stop Condition Generation
The bus condition can be indicated by reading the contents of SBI0SR2<BB>. SBI0SR2<BB> is set to "1"
when the start condition on the bus is detected (Bus Busy State) and is cleared to "0" when the stop condition is
detected (Bus Free State).
Table 18-3 SBI0CR1<TRX> Operation in Each Mode
Mode
Direction bit
Changing condition
TRX after changing
Slave mode
"0"
A received slave address is
the same as the value set to
I2C0AR<SA>
"0"
"1"
"1"
Master
mode
"0"
ACK signal is returned
"1"
"1"
"0"
Slave address and direction bit
Start condition
Acknowledge signal
2
3
4
5
6
7
8
9
A3
A2
A1
A0
A4
A5
A6
R/W
1
SCL0 pin
SDA0 pin
INTSBI0 Interrupt request
Stop condition
SCL0 pin
SDA0 pin
Содержание TLCS-870/C1 Series
Страница 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 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
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