M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 285

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

R
R
M
e
E
1
Figure 16.11 Interrupt request signal generation timing
. v
J
6
0
16.5.5 Bit 4: I
16.5.6 Bit 5: Bus Busy Flag (BB)
C
2
9
The PIN bit generates an I
PIN bit is changed from “1” to “0”. At the same time, an I
The PIN bit is synchronized with the last clock of the internal transfer clock (when ACK-CLK=1, the last
clock is the ACK clock: when the ACK-CLK=0, the last clock is the 8th clock) and it becomes "0". The
interrupt request is generated on the falling edge of the PIN bit. When the PIN bit is set to "0", the clock
applied to SCL maintains "L" and further clock generation is disabled. When the ACK-CLK bit is set to "1"
and the WIT bit in the S3D0 register is set to "1" (enable the I
completion). The PIN bit is synchronized with the last clock and the falling edge of the ACK clock. Then,
the PIN bit is set to "0" and I
timing of the I
The BB flag indicates the operating conditions of the bus system. When the BB flag is set to “0”, a bus
system is not in use and a START condition can be generated. The BB flag is set and reset based on an
input signal of the SCL and SDA pins either in master mode or in slave mode. When the START condition
is detected, the BB flag is set to "1". On the other hand, when the STOP condition is detected, the BB flag
is set to "0". The SSC4 to SSC0 bits in the S2D0 register decide to detect between the START condition
and the STOP condition. When the ES0 bit in the S1D0 register is set to "0" (I
or when the IHR bit in the S1D0 register is set to "1" (reset), the BB flag is set to "0". Refer to 16.9 START
Condition Generation Method and 16.11 STOP Condition Generation Method.
0 .
2 /
B
The PIN bit is set to “1” in one of the following conditions:
The PIN bit is set to “0” in one of the following conditions:
0
0
8
0
•When data is written to the S00 register
•When data is written to the S20 register (when the WIT bit is set to “1” and the internal WAIT flag is
•When the ES0 bit in the S1D0 register is set to “0” (I
•When the IHR bit in the S1D0 register is set to "1"(reset)
•With completion of 1-byte data transmit (including a case when arbitration lost is detected)
•With completion of 1-byte data receive
•When the ALS bit in the S1D0 register is set to "0" (addressing format) and slave address is matched
•When the ALS bit is set to "1" (free format) and the address data is received successfully in slave
4
G
J
set to “1”)
or general call address is received successfully in slave receive mode
receive mode
7
a
o r
0 -
. n
u
2
3
p
0
, 1
0
(
M
2
0
1
2
0
C bus interface interrupt request generation.
6
7
2
C
C bus Interface Interrupt Request Bit (PIN)
2 /
page 265
, 8
M
1
PIN flag
I
6
2
2
CIRQ
C
C bus interface interrupt request signal. Every one byte data is ransferred, the
S
f o
2 /
CL
2
8
C bus interface interrupt request is generated. Figure 16.11 shows the
3
) B
8
5
2
2
C bus interface interrupt request is generated.
C bus interface disabled)
2
C bus interface interrupt of data receive
16. MULTI-MASTER I
2
C bus interface disabled)
2
C bus INTERFACE