Fujitsu F2MC-16LX Hardware Manual page 102

CHAPTER 3 INTERRUPT
I Extended Intelligent I/O Service (EI
The Extended Intelligent I/O service (EI
update/fix the buffer address pointer and I/O register address pointer and to set the transfer
data format (in bytes or words) and transfer direction.
Bit 7 6
RESV RESV RESV
R/W R/W
R/W : Read-write
X : Undefined
*1 : Only the lower 16 bits of the buffer address pointer change.
The buffer address pointer can only be incremented.
*2 : The address pointer can only be incremented.
86
2
OS) Status Register (ISCS)
Figure 3.7-5 Configuration of EI
5 4 3 2
IF BW BF DIR
R/W R/W R/W R/W
SE
0 Not terminated by a request from the peripheral function.
Terminated by a request from the peripheral function
1
DIR
0 I/O register address pointer -> buffer address pointer.
Buffer address pointer -> I/O register address pointer
1
BF
0 After data transfer, the buffer address pointer is updated. (*1)
1 After data transfer, the buffer address pointer is not updated.
BW
Byte
0
1 Word
IF
0
After data transfer, the I/O register address pointer is updated. (*2)
1
After data transfer, the buffer address pointer is not updated.
RESV
0 must be written to these bits.
2
OS) status register (ISCS) is an eight-bit register to
2
OS status register (ISCS)
1 0 Initial value
XXXXXXXX
SE
B
R/W R/W
2
EI OS termination control bit
Data transfer direction specification bit
BAP update/fixed selection bit
Transfer data length specification bit
IOA update/fixed selection bit
Reserved bits