參數(shù)資料
型號(hào)： M37512FCH-XXXHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 4 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件頁(yè)數(shù)： 29/87頁(yè)
文件大?。?/td> 879K
代理商： M37512FCH-XXXHP
Feb 18, 2005
page 35 of 85
REJ03B0122-0101
7512 Group
I2C additional register
(1) bit 0: Time-out mode bit (TOM)
Setting the time-out mode bit “1” , continuity of I2C-Bus busy
state for about 16ms (f(XIN)=4MHz, high-speed mode) makes
time-out flag “1” and time-out interrupt occurs. Check the time-
out flag to know which interrupt source of the SCL/SDA
interrupt is occurred. When restart condition occurs in the
middle of communication, the time-out timer is cleared.
(2) bit 1: Time-out flag (TOF)
Time-out flag becomes “1” when the time-out state occurs.
Writing “1” to this bit, time-out timer is reset, and this bit is
cleared “0” also.
(3) I2C operation enable bit at WIT mode (WEB)
This bit determines multi-master I2C-BUS interface operation
at WIT mode. Setting this bit "0", multi-master I2C interface
source clock is not supplied at WIT mode. Setting this bit "1",
multi-master I2C interface source clock is supplied even at WIT
mode, and it makes possible multi-master I2C interface opera-
tion at WIT mode. Do not execute STP instruction at I2C
operation enable bit at WIT mode is "1".
(4) Stop condition flag (SCF)
This flag turns to “1”, when the stop condition is generated or
detected. This bit is cleared “0” at reset, or when I2C-Bus inter-
face enable bit is “0” or writing this bit “1”. This bit is available
only when I2C-Bus interface enable bit is “1”.
(5) ACK clock selection mode bit (ACS)
Setting this bit "1" clears the ACK bit (bit 6 of 002F16) "0" and
sets the ACK clock bit (bit 7 of 002F16) "1" automatically, when
the stop condition is detected.
Fig. 38 I2C additional register
b7
b0
I2C additional register
Time-out mode bit
0 : Disable
1 : Enable
Time-out flag
0 : Not generated
1 : Generated
*Writing this bit "1", this flag is cleared
I2C operation enable bit at WIT mode
0 : Disable
1 : Enable
Stop condition flag
0 : Not detect stop condition
1 : Detect stop condition
*Writing this bit "1", this flag is cleared
ACK clock selection mode bit
0 : Disable
1 : Enable
Not used (returns "0" when read)
(S3 : address 003116)
SCF WEB
ACS
TOF TOM
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