Page 274
18. Serial Bus Interface (SBI)
18.4 Functions
TMP89FM42
RA001
18.4.8 Interrupt service request and release
When a serial bus interface circuit is in the master mode and transferring a number of clocks set by
SBI0CR1<BC> and SBI0CR1<ACK> is complete, a serial bus interface interrupt request (INTSBI0) is gener-
ated.
In the slave mode, a serial bus interface interrupt request (INTSBI0) is generated when the above and follow-
ing conditions are satisfied:
• At the end of the acknowledge signal when the received slave address matches to the value set by the
I2C0AR<SA> with SBI0CR1<NOACK> set at "0"
• At the end of the acknowledge signal when a "GENERAL CALL" is received with
SBI0CR1<NOACK> set at "0"
• At the end of transferring or receiving after matching of the slave address or receiving of "GENERAL
CALL"
When a serial bus interface interrupt request occurs, SBI0CR2<PIN> is cleared to "0". During the time that
SBI0CR2<PIN> is "0", the SCL0 pin is pulled down to the low level.
Figure 18-11 SBI0CR2<PIN> and SCL0 Pin
Writing data to SBI0DBR sets SBI0CR2<PIN> to "1". The time from SBI0CR2<PIN> being set to "1" until
the SBI0 pin is released takes t
LOW
.
Although SBI0CR2<PIN> can be set to "1" by the software, SBI0CR2<PIN> can not be cleared to "0" by the
software.
18.4.9 Setting of serial bus interface mode
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
mode, confirm serial bus interface pins in a high level, and then, write "1" to SBI0CR2<SBIM>.
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
values to SBI0CR2, write "1" to SBI0CR2<SBIM> to activate the serial bus interface mode.
18.4.10Software reset
The serial bus interface circuit has a software reset function that initializes the serial bus interface circuit. If
the serial bus interface circuit locks up, for example, due to noise, it can be initialized by using this function.
SCL0 pin
SBI0CR2<PIN>
INTSBI0 interrupt request
2
3
7
8
9
1
1
tLOW
Set SBI0CR2<PIN> to "1" or
write data to SBI0DBR
SCL0 pin is pulled
to low when
SBI0CR2<PIN> is "0"
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: ......