r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 574

• Manufacturer Part Number: r5f21346mnfp
• Description: Single-chip Mcus Incorporates The R8c Cpu Core
• Manufacturer: Renesas Electronics Corporation.

R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
26.3.3
Table 26.6
STIE, NAKIE, RIE, TEIE, TIE: Bits in ICIER register
AL, STOP, NACKF, RDRF, TEND, TDRE: Bits in ICSR register
Transmit data empty
Transmit ends
Receive data full
Stop condition detection
NACK detection
Arbitration lost/overrun error
The I
when the clock synchronous serial format is used.
Table 26.6 lists the Interrupt Requests of I
Because these interrupt requests are allocated at the I
determined bit by bit.
When generation conditions listed in Table 26.6 are met, an I
the interrupt generation conditions to 0 by the I
Note that bits TDRE and TEND are automatically set to 0 by writing transmit data to the ICDRT register and
that the RDRF bit is automatically set to 0 by reading the ICDRR register. Especially, the TDRE bit is set to 0
when writing transmit data to the ICDRT register and set to 1 when transferring data from the ICDRT register
to the ICDRS register. If the TDRE bit is further set to 0, additional 1 byte may be transmitted.
Also, set the STIE bit to 1 (stop condition detection interrupt request enabled) when the STOP bit is set to 0.
2
Interrupt Requests
C bus interface has six interrupt requests when the I
Interrupt Request
Interrupt Requests of I
TXI
TEI
RXI
STPI
NAKI
2
C bus Interface
2
TIE = 1 and TDRE = 1
TEIE = 1 and TEND = 1
RIE = 1 and RDRF = 1
STIE = 1 and STOP = 1
NAKIE = 1 and AL = 1
(or NAKIE = 1 and NACKF = 1)
C bus Interface.
2
C bus interface interrupt routine.
Generation Condition
2
C bus interface interrupt vector table, the source must be
2
2
C bus format is used and four interrupt requests
C bus interface interrupt request is generated. Set
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
I
2
C bus
26. I
Format
Page 542 of 740
2
Synchronous
Enabled
Enabled
Enabled
Disabled
Disabled
Enabled
C bus Interface
Clock
Serial