Table 9-16. Icstat Register; Table 9-17. Icstat Fields - Sharp LH79524 User Manual

LH79524/LH79525 User's Guide
9.2.2.7 I
The ICSTAT register provides status regarding the state of the module.
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BITS
31:8
7
6
5
4
3
2
2
C Status Register (ICSTAT)

Table 9-16. ICSTAT Register

31 30 29 28
0 0 0 0
RO RO RO RO RO
15 14 13 12
///
0 0 0 0
RO RO RO RO RO
NAME
/// Reserved Reading returns 0. Write the reset value.
Slave Address
SLAVEAD
1 = Last byte received on the I
0 = Last byte received was not a Slave address byte
Receive Abort This bit indicates a Receive fault.
1 = (Slave Mode) The I
address bits matched but the lower address bits did not.
RXABORT
1 = (Master Mode) The upper and lower address bits match but a restart
was issued by the Master in Master-receive mode, and the repeated
upper address does not match.
0 = No Receive Abort
Transmit Abort This bit indicates a Transmit fault. This bit remains 1 until
the ICSTAT Register is read by software.
2
1 = I C Module is operating in the Master-transmitter mode and a Slave
TXABORT
device does not respond with an ACK signal after receiving a byte of
data, or arbitration was lost.
0 = No Transmit Abort
Idle Indicates that no messages are currently being processed.
IDLE 2
1 = I C Module is not processing any messages
2
0 = I C Module is actively processing messages
10-bit Address This status bit denotes that a 10-bit address was detected.
This bit remains 1 until automatically cleared when the ICSTAT Register is
read by software.
10BITADDR
1 = A 10-bit address is detected
0 = No 10-bit address detected
/// Reserved Reading returns 0. Write the reset value.
27 26 25 24 23
///
0 0 0 0 0
RO RO RO RO
11 10 9 8 7
0 0 0 0 0
RO RO RO RO
0xFFFC5000 + 0x1C

Table 9-17. ICSTAT Fields

DESCRIPTION
2
C bus was a Slave address byte
2
C Module is in 10-bit Slave mode and the upper
Version 1.0
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
///
0 0 1 0 0
RO RO RO RO RO
2
I C Module
17 16
0 0
RO RO
1 0
0 0
RO RO
9-11