TMP89FS60 datasheet(288/410 Pages) TOSHIBA

288 / 410 page

Page 274

18. Serial Bus Interface (SBI)

18.4 Functions

TMP89FS60

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 tLOW.

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

789

tLOW

Set SBI0CR2<PIN> to "1" or

write data to SBI0DBR

SCL0 pin is pulled

to low when

SBI0CR2<PIN> is "0"

TMP89FS60 Datasheet(PDF) 288 Page - Toshiba Semiconductor

TMP89FS60 Datasheet(HTML) 288 Page - Toshiba Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL