Fujitsu FR81S User Manual
CHAPTER 47: ON CHIP DEBUGER (OCD)
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: ON CHIP DEBUGGER : OCD
FUJITSU SEMICONDUCTOR CONFIDENTIAL
23
The relationship between the number of sampling clock cycles of the normal UART and the phase for the chip
reset sequence is as follows.
Phase of chip reset
sequence
Start phase
INIT
notification
phase
Idle
phase
Mode entry
phase
End phase
Sampling clock cycles of
the normal UART from
INIT release
1 to 32
33 to 600
601 to 856
857 to 1112
1112 to 1114
The following shows the chip reset sequence.
INIT
OSC Wait
mdio
(2)
(1)
RST
0
32
312
320
600
856
1112 1114
Sampling
clock cycles of
normal UART
DEBUG I/F
pin (mdii)
RST factor
release signal
Start
phase
INIT notification
phase
Mode entry
phase
End
phase
Write
command
Read
command
Idle
phase
OSC Wait : Oscillation of main source oscillation clock is stabilized. INIT is released after the oscillation
stabilization is confirmed.
(1)
: DEBUGIF is set to H level by pull-up processing of the tool.
(2)
: DEBUGIF becomes the level of pull-up processing on the user system.
MB91520 Series
MN705-00010-1v0-E
2034