HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 137
HD6417615
Manufacturer Part Number
HD6417615
Description
Hardware Manual
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417615.pdf
(873 pages)
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Cautions
If PLL circuit 1 or PLL circuit 2 does not become operational after modifying the frequency
modification register (including modification in the operating state), it means that the above
procedure or cautions have not been properly observed. In this case, the WDT will not operate
even though the frequency modification register is modified.
FREQUENCY_END:
The read from the external memory space 0–4 cache-through area and the write to the
frequency modification register should be performed in on-chip X/Y memory. After reading
from the external memory space 0–4 cache-through area, do not perform any write operations
in external memory spaces 0–4 until the write to the frequency modification register.
When the write access to the frequency modification register is executed, the WDT starts
automatically.
Do not turn off the CKIO output when PLL circuit 1 is in the operating state.
The CKIO output will be unstable until the PLL circuit stabilizes.
When a frequency is modified, halt the on-chip DMAC (E-DMAC and DMAC) operation
before the frequency modification.
; Iø( 4)=60MHz, Eø( 2)=30MHz,
; Pø( 2)=30MHz, CKIO(Eø)=30MHz,
; PLL circuits 1 and 2
; Iø( 4)=60MHz, Eø( 1)=15MHz,
; Pø( 1)=15MHz, CKIO(Eø)=15MHz,
;
MOV.B
rts
nop
NOP
.END
MOV
MOV
R0,@R4
#H'0A,R0
#H'08,R0
Enabled.
119
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