Extended Intelligent I/O Service (Ei 2 Os) Processing Time - Fujitsu MB90335 Series Hardware Manual

MB90335 Series
3.6.5 Extended Intelligent I/O Service (EI
The time required for extended intelligent I/O service (EI
the following factors:
2
• Setting of EI OS status register (ISCS)
• Address (area) indicating I/O register address pointer (IOA)
• Address (area) indicating buffer address pointer (BAP)
• Width of external data bus when external is accessed
• Data length of transfer data
Because a hardware interrupt is activated at the end of data transfer by EI
interrupt handling time will be added.
■ Extended Intelligent I/O Service (EI
●
For continued data transfer
For continued data transfer, the EI
(ISCS), as listed in Table 3.6-2.
Table 3.6-2 Extended Intelligent I/O Service Execution Time
2
Setting of the EI OS termination control bit (SE)
Setting of the IOA updating/fixing select bit (IF)
BAP address update/fixation
Setting of selection bits (BF)
Unit: One machine cycle is equal to one clock cycle of the machine clock (φ).
CM44-10137-6E
3.6 Interrupts by Extended Intelligent I/O Service (EI
2
OS) Processing Time (Time for One Transfer)
2
OS processing time varies with the setting in the EI
Terminated by an end
request from periphery
Fixed
Fixed 32
Update 34
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 3 INTERRUPT
2
OS) Processing Time
2
OS) processing depends on
Termination request from the
surrounding is disregarded.
Update Fixed
34 33
36 35
2
OS)
2
OS, the
2
OS status register
Update
35
37
81