TMP91xy20AFG Toshiba, TMP91xy20AFG Datasheet - Page 187

• Manufacturer Part Number: TMP91xy20AFG
• Manufacturer: Toshiba

Specifications of TMP91xy20AFG

• Package: LQFP144
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): M
• Rom Combinations: 8
• Ram Combinations: 8
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 1
• I2c/sio Bus Channels: 1
• (s)dram Controller: 1
• Adc 10-bit Channel: 8
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: 1
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: 4
• Dual Clock: Y
• Number Of I/o Ports: 77
• Power Supply Voltage(v): 3.0 to 3.6

SCL line
Internal SDA output
(Master A)
Internal SDA output
(Master A)
SDA line
(8) Interrupt service requests and interrupt cancellation
(9) Serial bus interface operation mode selection
(10) Arbitration lost detection monitor
is cleared to 0. During the time that the SBI0CR2<PIN> is 0, the SCL line is pulled
down to the low level.
writing/reading data to/from SBI0DBR sets the <PIN> to 1.
In the address recognition mode (<ALS> = 0), <PIN> is cleared to 0 when the received
slave address is the same as the value set at the I2C0AR or when a GENERAL CALL is
received (All 8-bit data are 0 after a start condition). Although SBI0CR2<PIN> can be
set to 1 by the program, the <PIN> is not clear it to 0 when it is written 0.
SBI0CR2<SBIM1:0> to 10 when the device is to be used in I
confirming pin condition of serial bus interface to “H”.
mode, a bus arbitration procedure has been implemented in order to guarantee the
integrity of transferred data.
devices exist simultaneously on the bus. Master A and master B output the same data
until point a. After master A outputs L and master B, H, the SDA line of the bus is
wire-AND and the SDA line is pulled down to the low-level by master A. When the SCL
line of the bus is pulled up at point b, the slave device reads the data on the SDA line,
that is, data in master A. A data transmitted from master B becomes invalid. The state
in master B is called “ARBITRATION LOST”. Master B device, which loses arbitration
releases the internal SDA output in order not to affect 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.
When a serial bus interface interrupt request (INTSBI) occurs, the SBI0CR2 <PIN>
The <PIN> is cleared to 0 when a 1 word of data is transmitted or received. Either
The time from the <PIN> being set to 1 until the SCL line is released takes t
SBI0CR2<SBIM1:0> is used to specify the serial bus interface operation mode. Set
Switch a mode to port after confirming a bus is free.
Since more than one master device can exist simultaneously on the bus in I
Data on the SDA line is used for I
The following shows an example of a bus arbitration procedure when two master
Figure 3.10.11 Arbitration Lost
91C820A-185
a
b
2
Internal SDA output becomes 1 after arbitration has been lost.
C bus arbitration.
2
C bus mode after
TMP91C820A
2008-02-20
LOW
2
C bus
.