TMP86C993XB(EYZ) Toshiba, TMP86C993XB(EYZ) Datasheet - Page 170

• Manufacturer Part Number: TMP86C993XB(EYZ)
• Description: EMULATION CHIP FOR TMP86F SSOP
• Manufacturer: Toshiba
• Series: -r

Specifications of TMP86C993XB(EYZ)

• Accessory Type: Adapter
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: TMP86F SSOP
• Other names: TMP86C993XB; TMP86C993XB

15.5
I
2
C Bus Control
15.5.9
15.5.10
SCL (Bus)
SDA pin (Master 1)
SDA pin (Master 2)
SDA (Bus)
pins in a high level, and then, write “10” to SBIM. And switch a port mode after confirming that a bus is free.
mented in order to guarantee the contents of transferred data.
on a bus. Master 1 and Master 2 output the same data until point “a”. After that, when Master 1 outputs “1” and
Master 2 outputs “0”, since the SDA line of a bus is wired AND, the SDA line is pulled-down to the low level
by Master 2. When the SCL line of a bus is pulled-up at point “b”, the slave device reads data on the SDA line,
that is data in Master 2. Data transmitted from Master 1 becomes invalid. The state in Master 1 is called “arbitration
lost”. A master device which loses arbitration releases the SDA pin and the SCL pin in order not to effect data
transmitted from other masters with arbitration. When more than one master sends the same data at the first word,
arbitration occurs continuously after the second word.
the SCL line. If the levels are unmatched, arbitration is lost and the AL (Bit3 in SBISRB) is set to “1”.
mode. Thus, the serial bus interface circuit stops output of clock pulses during data transfer after the AL is set to
“1”.
SBICRB.
The SBIM (Bit3 and 2 in SBICRB) is used to set I
Set the SBIM to “10” in order to set I
Since more than one master device can exist simultaneously on a bus, a bus arbitration procedure is imple-
Data on the SDA line is used for bus arbitration of the I
The following shows an example of a bus arbitration procedure when two master devices exist simultaneously
The serial bus interface circuit compares levels of a SDA line of a bus with its SDA pin at the rising edge of
When the AL is set to “1”, the MST and TRX are cleared to “0” and the mode is switched to a slave receiver
The AL is cleared to “0” by writing data to the SBIDBR, reading data from the SBIDBR or writing data to the
Setting of I
Arbitration lost detection monitor
2
C bus mode
Figure 15-7 Arbitration Lost
2
C bus mode. Before setting of I
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a
2
C bus mode.
b
2
C bus.
SDA pin becomes "1" after losing arbitration.
2
C bus mode, confirm serial bus interface
TMP86FH92DMG