M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 287

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

R
R
M
16.6 I
e
E
1
. v
J
6
Table16.4 Timing of Interrupt Generation in Data Receive Mode
1) Synchronized with the falling edge of the
2) Synchronized with the falling edge of the
0
C
The S3D0 register controls the I
16.6.1 Bit 0 : Interrupt Enable Bit by STOP Condition (SIM )
16.6.2 Bit 1: Interrupt Enable Bit at the Completion of Data Receive (WIT)
I
2
9
2
ACK clock
The internal WAIT flag can be read by reading the WIT bit. The internal WAIT flag is set to "1" after writing
data to the S00 register and it is set to "0" after writing to the S20 register.
Consequently, the I
(See Figure 16.12)
When the data is transmitted and the address data is received immediately after the START condition,
the WAIT flag remains "0" regardless of the WIT bit setting, and the I
only generated at the falling edge of the ACK clock. Set the WIT bit to “0” when the ACK-CLK bit in the
S20 register is set to "0" (no ACK clock).
0 .
2 /
B
The SIM bit enables the I
is set to “1”, the I
change in the PIN flag).
When the WIT bit is set to "1" (enable the I2C bus interface interrupt upon completion of receiving data)
while the ACK-CLK bit in the S20 register is set to "1" (ACK clock), the I
is generated, synchronizing with the falling edge of the last data bit clock, and the PIN bit is set to "0"
(request interrupt) . Then an "L" signal is applied to the SCL
trolled. Table 16.4 and Figure 16.12 show the interrupt generation timing and the procedure of commu-
nication restart. After the communication is restarted, the PIN bit is set to "0" again, synchronized with the
falling edge of the ACK clock, and the I
C bus Interface Interrupt Generation Timing
last data bit clock
0
0
8
0
4
G
2
J
7
a
C0 Control Register 1 (S3D0 register)
o r
0 -
. n
u
2
3
p
0
, 1
0
(
M
2
0
1
0
6
7
C
2
2 /
C bus interface interrupt request is generated by the STOP condition detect (no need to
page 267
2
, 8
C bus interface interrupt request generated by the timing 1) or 2) can be determined.
M
1
6
2
C bus interface interrupt request by detecting a STOP condition. If the SIM bit
C
f o
2 /
8
2
3
) B
C bus interface circuit.
8
5
2
C bus interface interrupt request is generated.
Set the ACK bit in the S20 register.
Set the PIN bit to "1".
Set the S00 register
(Do not write to the S00 register. The ACK clock
operation may be unstable.)
Procedure of Communication Restart
MM
16. MULTI-MASTER I
and the ACK clock generation is con-
2
C bus interface interrupt request is
2
C bus interface interrupt request
2
C bus INTERFACE