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| 型号： | TMP86CH72FG |
| 厂商： | Toshiba Corporation |
| 英文描述： | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 19.5 to 20.4; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
| 中文描述： | 8位微控制器 |
| 文件页数： | 155/198页 |
| 文件大小： | 1821K |
| 代理商： | TMP86CH72FG |
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Page 145
TMP86CH72FG
14.6 Data Transfer of I
2
C Bus
14.6.1 Device initialization
For initialization of device, set the ACK in SBICRA to “1” and the BC to “000”. Specify the data length to 8
bits to count clocks for an acknowledge signal. Set a transfer frequency to the SCK in SBICRA.
Next, set the slave address to the SA in I2CAR and clear the ALS to “0” to set an addressing format.
After confirming that the serial bus interface pin is high level, for specifying the default setting to a slave
receiver mode, clear “0” to the MST, TRX and BB in SBICRB, set “1” to the PIN, “10” to the SBIM, and “00”
to bits SWRST1 and SWRST0.
Note:The initialization of a serial bus interface circuit must be complete within the time from all devices which are
connected to a bus have initialized to and device does not generate a start condition. If not, the data can not
be received correctly because the other device starts transferring before an end of the initialization of a serial
bus interface circuit.
14.6.2 Start condition and slave address generation
Confirm a bus free status (BB = 0).
Set the ACK to “1” and specify a slave address and a direction bit to be transmitted to the SBIDBR.
By writing “1” to the MST, TRX, BB and PIN, the start condition is generated on a bus and then, the slave
address and the direction bit which are set to the SBIDBR are output. The time from generating the START
condition until the falling SCL pin takes t
LOW
.
An INTSBI interrupt request occurs at the 9th falling edge of a SCL clock cycle, and the PIN is cleared to
“0”. The SCL pin is pulled-down to the low level while the PIN is “0”. When an interrupt request occurs, the
TRX changes by the hardware according to the direction bit only when an acknowledge signal is returned from
the slave device.
Note 1: Do not write a slave address to be output to the SBIDBR while data is transferred. If data is written to the
SBIDBR, data to been outputting may be destroyed.
Note 2: The bus free must be confirmed by software within 98.0
μ
s (The shortest transmitting time according to the
I
2
C bus standard) after setting of the slave address to be output. Only when the bus free is confirmed, set
"1" to the MST, TRX, BB, and PIN to generate the start conditions. If the writing of slave address and setting
of MST, TRX, BB and PIN doesn't finish within 98.0
μ
s, the other masters may start the transferring and the
slave address data written in SBIDBR may be broken.
Figure 14-9 Start Condition Generation and Slave Address Transfer
14.6.3 1-word data transfer
Check the MST by the INTSBI interrupt process after an 1-word data transfer is completed, and determine
whether the mode is a master or slave.
Start condition
Slave address + Direction bit
A6
A5
2
3
4
5
6
7
8
9
A4
A3
A2
A1
A0
R/W
1
Acknowledge
signal from a
slave device
SCL pin
SDA pin
PIN
INTSBI
interrupt request
相关PDF资料 |
PDF描述 |
|---|---|
| TMP86CK74AFG | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 20.2 to 21.1; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
| TMP86CM23AUG | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 20.9 to 21.9; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
| TMP86CM27FG | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 21.6 to 22.6; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
| TMP86CM29BFG | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 22.3 to 23.3; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
| TMP86CM29BUG | Zener Diode; Application: General; Pd (mW): 500; Vz (V): 22.9 to 24.0; Condition Iz at Vz (mA): 2; C (pF) max: -; Condition VR at C (V):   ESD (kV) min: -; Package: DO-35 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TMP86CK74AF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| TMP86CK74AFG | 制造商:Toshiba America Electronic Components 功能描述:MCU 8BIT TLCS-870 CISC 24KB ROM 5V 80PQFP - Rail/Tube |
| TMP86CM23AUG | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:8 Bit Microcontroller |
| TMP86CM23UG | 制造商:Toshiba America Electronic Components 功能描述:TLCS870/C 32K ROM, LCD - Rail/Tube |
| TMP86CM25F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:CMOS 8-BIT MICROCONTROLLER |
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