
ML62Q1000 Series User's Manual
Chapter 12
I2C Bus Unit
FEUL62Q1000
12-13
Bit no.
Bit symbol
name
Description
Even if this bit is set to "1", the I2CU0_SDA pin output continues until the subsequent byte
data communication terminates when the clock stretch function is not used (I2UM0SYN =
"0").
1
I2UM0ACR
This bit is used to store the acknowledgment signal received in the master mode.
Acknowledgment signals are received when the slave address is transmitted and the data
transmission or reception is completed.
When "1" is written to this bit, this bit is reset to "0".
0:
Received acknowledgment "0" (initial value)
1:
Received acknowledgment "1"
0
I2UM0BB
This bit is used to indicate the usage state of the I2C bus in the master mode.
When the start condition is generated on the I2C bus this bit is set to "1", and when the stop
condition is generated this bit is reset to "0".
To reset this bit, write "1" to this bit or write "0" to I2UM0EN bit.
0: The status of I
2
C bus is free (initial value)
1: The status of I
2
C bus is busy
[Note]
Ÿ
Do not update each bit of the I2UM0STR register by using the bit symbol. Update it by using a byte
access, not so that unintented bits are changed by the bit access instructions.
Ÿ
I2UM0BB bit and I2UM0BO bit are reset one I
2
C operating clock after writing
"
1
"
to the bits.
Summary of Contents for ML62Q1000 Series
Page 17: ...Chapter 1 Overview...
Page 112: ...Chapter 2 CPU and Memory Space...
Page 154: ...Chapter 3 Reset Function...
Page 166: ...Chapter 4 Power Management...
Page 196: ...Chapter 5 Interrupts...
Page 248: ...Chapter 6 Clock generation Circuit...
Page 274: ...Chapter 7 Low Speed Time Base Counter...
Page 291: ...Chapter 8 16 Bit Timer...
Page 320: ...Chapter 9 Functional Timer FTM...
Page 382: ...Chapter 10 Watchdog Timer...
Page 402: ...Chapter 11 Serial Communication Unit...
Page 456: ...Chapter 12 I2 C Bus Unit...
Page 491: ...Chapter 13 I2 C Master...
Page 512: ...Chapter 14 DMA Controller...
Page 531: ...Chapter 15 Buzzer...
Page 550: ...Chapter 16 Simplified RTC...
Page 559: ...Chapter 17 GPIO...
Page 594: ...Chapter 18 External Interrupt Function...
Page 612: ...Chapter 19 CRC Generator...
Page 632: ...Chapter 20 Analog Comparator...
Page 644: ...Chapter 21 D A Converter...
Page 655: ...Chapter 22 Voltage Level Supervisor...
Page 676: ...Chapter 23 Successive Approximation Type A D Converter...
Page 709: ...Chapter 24 Regulator...
Page 714: ...Chapter 25 Flash Memory...
Page 743: ...Chapter 26 Code Option...
Page 750: ...Chapter 27 LCD Driver...
Page 788: ...Chapter 28 On Chip Debug Function...
Page 795: ...Chapter 29 Safety Function...
Page 813: ...Appendix A...
Page 881: ...Revision History...