h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 338

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Rev. 1.00, 05/04, page 304 of 544
Bit
4
Bit Name
ICDRE
Initial
Value
0
R/W
R
Description
Transmit Data Write Request Flag
Indicates the ICDR (ICDRT) status in transmit mode.
0: Indicates that the data has been already written to
1: Indicates that data has been transferred from ICDRT
[Setting conditions]
•
•
[Clearing conditions]
•
•
•
•
Note that if the ACKE bit is set to 1 with I
thus enabling acknowledge bit decision, ICDRE is not
set when data transmission is completed while the
acknowledge bit is 1.
When ICDRE is set due to the condition (2) above,
ICDRE is temporarily cleared to 0 when data is written to
ICDR (ICDRT); however, since data is transferred from
ICDRT to ICDRS immediately, ICDRE is set to 1 again.
Do not write data to ICDR when TRS = 0 because the
ICDRE flag value is invalid during the time.
ICDR (ICDRT) or ICDR is initialized.
to ICDRS and is being transmitted, or the start
condition has been detected or transmission has
been complete, thus allowing the next data to be
written to.
When the start condition is detected from the bus
line state with I
When data is transferred from ICDRT to ICDRS.
1. When data transmission completed while ICDRE
2. When data is written to ICDR in transmit mode
When data is written to ICDR (ICDRT).
When the stop condition is detected with I
format or serial format.
When 0 is written to the ICE bit.
When the IIC is internally initialized using the CLR3
to CLR0 bits in DDCSWR.
= 0 (at the rise of the 9th clock pulse).
after data transmission was completed while
ICDRE = 1.
2
C bus format or serial format.
2
C bus format
2
C bus