R01UH0092EJ0110 Rev.1.10
Page 545 of 807
Jul 31, 2012
M16C/64C Group
25. Multi-master I
2
C-bus Interface
25.2.6
I2C0 Start/Stop Condition Control Register (S2D0)
SSC4 to SSC0 (Start/stop condition setting bit) (b4-b0)
Set bits SSC4 to SSC0 to select the start/stop condition detect parameter (SCL open time, setup time,
hold time) in standard-speed clock mode. Refer to 25.3.7 “Detecting Start/Stop Conditions”.
Do not set an odd value or 00000b to these bits.
SIP (SCL/SDA interrupt pin polarity select bit) (b5)
SIS (SCL/SDA interrupt pin select bit) (b6)
The IR bit in the SCLDAIC register becomes 1 (interrupt requested) when the I
2
C interface detects the
edge selected by the SIP bit for the pin signal selected by the SIS bit. Refer to 25.4 “Interrupts”.
STSPSEL (Start/stop condition generation select bit) (b7)
See Table 25.13 “Setup/Hold Time for Generating a Start/Stop Condition”.
If the fVIIC frequency is more than 4 MHz, set the STSPSEL bit to 1 (long mode).
b7 b6 b5 b4
b1
b2
b3
I2C0 Start/Stop Condition Control Register
Symbol
S2D0
Address
02B5h
Bit Symbol
Bit Name
RW
Reset Value
0001 1010b
b0
Function
SSC3
SSC4
RW
SIP
RW
SIS
STSPSEL
SCL/SDA interrupt pin select bit
0: Short setup/hold time mode
1: Long setup/hold time mode
Start/stop condition generation
select bit
RW
SSC0
Start/stop condition setting bit
SSC1
SSC2
Refer to SSC4 to SSC0 (Start/Stop
Condition Setting Bit) (b4 to b0) in the
same page
RW
RW
RW
RW
RW
SCL/SDA interrupt pin polarity
select bit
0: SDAMM
1: SCLMM
0: Falling edge
1: Rising edge
Содержание M16C Series
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