1091
ICSR0—I
2
C Bus Status Register
ICSR1—I
2
C Bus Status Register
H'FF79
H'FF81
IIC0
IIC1
7
ESTP
0
R/(W)
*
6
STOP
0
R/(W)
*
5
IRTR
0
R/(W)
*
4
AASX
0
R/(W)
*
3
AL
0
R/(W)
*
0
ACKB
0
R/W
2
AAS
0
R/(W)
*
1
ADZ
0
R/(W)
*
Note:
*
Only 0 can be written to these bits (to clear these flags).
Error stop condition detection flag
0
No error stop condition
[Clearing]
(1) When 0 written after reading ESTP=1;
(2) When IRIC flag is cleared to 0.
1
• Error stop condition detected in slave mode in I
2
C bus format
[Setting]
On detection of stop condition while sending frame.
• No meaning when in other than slave mode in I
2
C bus format
Normal end condition detection flag
0
No normal end condition
[Clearing]
(1) When 0 is written after reading STOP=1;
(2) When IRIC flag is cleared to 0.
1
Normal end condition detected in slave mode in I
2
C bus format
[Setting]
On detection of stop condition on completion of sending frame.
• No meaning when in other than slave mode in I
2
C bus format
I
2
C bus interface continuous transmit and receive interrupt request flag
0
Transmit wait state, or transmitting
[Clearing]
(1) When 0 written after reading IRTR=1;
(2) When IRIC flag is cleared to 0.
1
Continuous transmit state
[Setting]
• In I
2
C bus interface slave mode
When 1 is set in TDRE or RDRF flag when AASX=1.
• In other than I
2
C bus interface slave mode
When TDRE or RDRF flag is set to 1.
2nd slave address confirmation flag
0
2nd slave address not confirmed
[Clearing]
(1) When 0 is written after reading AASX=1;
(2) When start conditions are detected;
(3) In master mode.
1
2nd slave address confirmed
[Setting]
• When 2nd slave address is detected in slave receive mode and FSX = 0.
Arbitration lost flag
0
Secure bus.
[Clearing]
(1) When data is written to ICDR (when sending), or when data is read (when
receiving);
(2) When 0 is written after reading AL=1.
1
Bus arbitration lost
[Setting]
(1) When there is a mismatch between internal SDA and SDA pin at rise in SCL
in master transmit mode;
(2) When the internal SCL level is HIGH at the fall in SCL in master transmit mode.
Slave address confirmation flag
0
Slave address or general call address not confirmed
[Clearing]
(1) When data is written to ICDR (when sending), or when data is
read from ICDR (when receiving);
(2) When 0 is written after reading AAS=1;
(3) In master mode.
1
Slave address or general call address confirmed
[Setting]
• When slave address or general call address is detected in slave
receive mode and FS = 0.
General call address confirmation flag
0
General call address not confirmed
[Clearing]
(1) When data is written to ICDR (when sending), or when data is
read from ICDR (when receiving);
(2) When 0 is written after reading ADZ=1;
(3) In master mode.
1
General call address confirmation
[Setting]
• When general call address is detected is in slave receive mode and
FSX = 0 or FS = 0).
Acknowledge bit
0
When receiving, 0 is output at acknowledge output timing.
When transmitting, this bit shows that an acknowledge (0)
has not been sent from the receiving device.
1
When receiving, 1 is output at acknowledge output timing.
When transmitting, this bit shows that an acknowledge (1)
has been sent from the receiving device.
Bit
Initial value
R/W
:
:
:
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...